Mono addition of HBr to conjugated dienes leads to multiple products, and a given addition product can arise from more than one conjugated diene. Given below are the structures of five pairs of dienes - possible reactants in the reaction - and two allylic bromide products. Identify the pair of dienes wherein each diene can serve as a precursor for both of the addition products. Note that not all possible products are shown.

Answers

Answer 1

Mono addition of HBr to conjugated dienes leads to multiple products, and a given addition product can arise from more than one conjugated diene. The pair of dienes which can serve as precursors for both of the addition products are diene 1 and diene 2. Diene 1 can give rise to the allylic bromide product A as well as product B.

Diene 2 can give rise to the allylic bromide product C as well as product B.
The other three dienes cannot give rise to either of the two given allylic bromide products.
The given pairs of dienes are:
(a) H2C=CHCH=CH2 and H2C=CHCH2CH=CH2
(b) H2C=CHCH=CH2 and H2C=CHCH=CHCH3
(c) H2C=CHCH=CHCH3 and H2C=CHCH2CH=CH2
(d) H2C=CHCH=CHCH3 and H2C=CH2CH=CHCH3
(e) H2C=CHCH=CHCH3 and H2C=CH=CHCH2CH3 The given allylic bromide products are 1,2-dibromobutane and 2-bromo-2-butene respectively. Hence, the correct pair of dienes is (b) H2C=CHCH=CH2 and H2C=CHCH=CHCH3, since both of these dienes can act as precursors for both of the allylic bromide products.

For more such questions on HBr

https://brainly.com/question/12858312

#SPJ11


Related Questions

F. Recognize that there are more than 100 elements and some have
similar properties as shown on the Periodic Table of Elements.
Type of Element Metals
Properties
Examples:
Nonmetals
Metalloids
Helgitula

Answers

Answer:

Metals are malleable, and ductile, have a shiny luster, form metallic bonds, and are superb conductors (to name some properties).

Ex. Copper

Malleable is the ability to be pounded into thin sheets.

Ductile is the ability to be drawn into a thin wire.

Metallic is metal-to-metal bonding.

Nonmetals, however, are not malleable, or ductile, are not good conductors and form covalent and ionic bonds.

Ex. Carbon

Covalent is nonmetal-to-nonmetal bonding.

Ionic is metal-to-nonmetal bonding.

Metalloids

Semiconductors, and are basically metal and nonmetal properties combined. I.E. Has a metallic luster but is brittle (not malleable).

Ex. Sillicon

which enzyme is used to break down triacylglycerol into fatty acids and glycerol?

Answers

Triacylglycerol is broken down by the enzyme lipase into fatty acids and glycerol. It is released by the pancreas and other digestive organs and is essential to the body's ability to digest and absorb fats.

Lipase is the enzyme that converts triacylglycerol into fatty acids and glycerol. The pancreas and other digestive organs release lipase, which is essential for the breakdown and absorption of fats in the body. Triacylglycerols are a kind of lipid that is frequently present in meals including meat, dairy goods, and oils. The triacylglycerol molecule's fatty acid ester linkages are hydrolyzed by lipase, releasing the molecules' separate fatty acids and glycerol. The body's cells can utilize these smaller parts for energy or store them as fat when they are absorbed into the circulation and delivered there. Other lipids, including phospholipids and cholesterol esters, are also broken down by lipase. and is essential for maintaining proper lipid metabolism and homeostasis in the body.

learn more about Triacylglycerol here:

https://brainly.com/question/29697122

#SPJ4

When scientists discovered that atoms are composed of smaller particles, why didn’t they reject atomic theory?

Answers

When scientists first discovered that atoms were composed of smaller particles, such as electrons, protons, and neutrons, they did not reject atomic theory because the experimental evidence supported the idea that atoms were still the fundamental building blocks of matter.

Instead of rejecting atomic theory, scientists modified it to incorporate the new information about the structure of atoms. For example, Ernest Rutherford's famous gold foil experiment in 1911 showed that atoms had a small, positively charged nucleus at their center, which was surrounded by negatively charged electrons.

This discovery led to the development of the modern model of the atom, which is still based on the idea that atoms are the smallest units of matter that retain the properties of an element. However, the model has been updated to reflect our current understanding of the subatomic particles that make up atoms.

To know more about atomic theories, here

brainly.com/question/28853813

#SPJ4

What is the percentage by mass of hydrogen in glucose, C6H12O6?

Answers

Glucose has a molecular weight of 180.18 g/mol, while hydrogen has an atomic weight of 1.008 g/mol. As a result, glucose has a mass-based hydrogen content of around 7.48%.

With the molecular formula C6H12O6, or six carbon atoms, twelve hydrogen atoms, and six oxygen atoms, glucose is a simple sugar. The atomic weights of glucose's component atoms may be added to determine its molecular weight, which is 180.18 g/mol. We must ascertain the mass of the hydrogen atoms contained in one mole of glucose in order to calculate the proportion of hydrogen by mass in glucose. Twelve hydrogen atoms have a mass of 12.096 g/mol because their atomic weight is 1.008 g/mol. Hence, based on mass, glucose has a hydrogen concentration of approximately 7.48% (12.096/180.18 x 100%).

learn more about hydrogen here:

https://brainly.com/question/28937951

#SPJ4

During the 'relative refractory period' of the action potential, the axolemma is more permeable to what?

Answers

During the relative refractory period of the action potential, the axolemma is more permeable to potassium ions.

What is axolemma?

Axolemma refers to the plasma membrane that surrounds an axon. It is a lipid bilayer that is semipermeable, meaning that it only permits certain molecules and ions to pass through. The action potential is a temporary change in the electrical potential that travels along the axon of a neuron. An action potential is generated when the axon is depolarized, causing a brief, rapid reversal of the polarity of the axolemma. This reversal of polarity triggers the release of neurotransmitters from the axon terminal into the synaptic cleft.

When an action potential is generated, the axolemma becomes more permeable to ions. During the relative refractory period, which is the period immediately following an action potential, the axolemma is more permeable to potassium ions. This increased permeability is due to the opening of voltage-gated potassium channels in the axolemma, which allows potassium ions to move out of the cell.

The relative refractory period is a time when it is harder to generate another action potential in the axon. This is because the threshold for depolarization is higher due to the increased permeability of the axolemma to potassium ions. However, it is still possible to generate another action potential if the stimulus is strong enough to overcome the increased threshold.

Learn more about Relative refractory period here:

https://brainly.com/question/30460363

#SPJ11

many soap recipes call for the addition of 5% excess fat. explain the benefit of using excess fat.

Answers

Answer:Superfatting is done for two reasons. The first is that extra oils add more moisturizing qualities to your soap (sometimes referred to as emollients). The second is that the common 5% superfatting allows you to a bit more leeway with your lye.

Explanation:What Are the Benefits of Using Excess Fat to Make Soap?

Written by Mustiin Soap

Handcrafted soaps with a little touch of essential oils and sweet, subtle fragrances can offer you a powerful bathing experience. While aroma enriches your mind, the excess fats, on the other hand, are the ones that enhance the overall impact on your skin. Whether made by a hot or cold process, adding fats is essential.

Adding excess fat or superfatting of soap benefits the soap’s moisturizing ability. Another significant benefit is its compatibility with the skin’s pH. As the soap has a pH of about 9.5, and the skin’s pH varies between 4.5-6. Superfatting is used to make the soap more skin-friendly.

A rigid cylinder of gas has a volume of 3.0 liters. The pressure is 3.30 atm at 20°C. At what
temperature, in K, will it reach a pressure of 7.30 atm? (Note: the volume does NOT change!)

Answers

The temperature at which the gas will reach a pressure of 7.30 atm is 1627 K.

What is the Combined gas law?

We can use the combined gas law equation to solve this problem. The combined gas law states that for a fixed amount of gas, the pressure times the volume divided by the temperature is a constant:

P₁V₁/T₁ = P₂V₂/T₂

where P₁, V₁, and T₁ are the initial pressure, volume, and temperature, respectively, and P₂, V₂, and T₂ are the final pressure, volume, and temperature, respectively.

Because the volume of the gas remains constant, we can simplify the equation to:

P₁/T₁ = P₂/T₂

Rearranging for T₂, we get:

T₂ = (P₂/P₁) * T₁

Substituting the given values, we get:

T₂ = (7.30 atm / 3.30 atm) * 293 K

T₂ = 1627 K

To know more about pressure, visit:

https://brainly.com/question/12971272

#SPJ1

The temperature of the gas must be 649.47 K in order to reach a pressure of 7.30 atm at a constant volume of 3.0 L.

What is Temperature?

Temperature is a measure of the average kinetic energy of the particles in a substance or system. It determines the direction of heat flow between two objects in contact, with heat flowing from the object with a higher temperature to the one with a lower temperature until they reach thermal equilibrium. The SI unit of temperature is the kelvin (K), which is defined based on the triple point of water, where the temperature is 273.16 K. Other common temperature scales include Celsius and Fahrenheit.

We can use the combined gas law to solve this problem:

(P1/T1) = (P2/T2)

where P1, T1 are the initial pressure and temperature and P2, T2 are the final pressure and temperature.

We are given that P1 = 3.30 atm, T1 = 20°C + 273.15 = 293.15 K, P2 = 7.30 atm, and V is constant at 3.0 L.

Plugging in these values and solving for T2, we get:

(3.30/293.15) = (7.30/T2)

T2 = (7.30 * 293.15) / 3.30

T2 = 649.47 K

Learn more about Temperature from given link

https://brainly.com/question/26866637

#SPJ1

Can any help with this chemistry question?? I have an exam tomorrow
(20 points)

Answers

The standard enthalpy of formation of TiCl₄ (I) is -750kJ mol ⁻¹. The correct answer for the given reaction of Titanium tetrachloride is thus option C.

What is standard enthalpy of formation?

The standard enthalpy of formation (ΔH°f) is the modification in enthalpy that happens when one mole of a substance is formed from its component elements in their standard states under standard conditions of temperature and pressure (298 K and 1 atm pressure).

To determine the standard enthalpy of formation for TiCl₄ (I), we need to use Hess's law and combine the given reactions in a way that cancels out all the other reactants and leaves only  TiCl₄ (I) as the product. We can achieve this by reversing the first equation and adding it to the second and third equations:

Ti(s) + 2Cl₂(g) + 2CO₂(g) →  TiCl₄ (l) + 2CO₂(g) + 2Cl₂(g) ∆H = +232 kJ mol⁻¹

Ti(s) + O₂(g) → TiO₂(s) = −912 kJ mol⁻¹

C(s) + O₂(g) → CO₂(g) = −394 kJ mol⁻¹

Now, we can cancel out the CO₂(g) and Cl₂(g) on both sides and simplify the equation to:

Ti(s) + 2Cl₂(g) + C(s) →  TiCl₄ (I)  ∆H = +232 kJ mol⁻¹ - 2(-394 kJ mol⁻¹) - 912 kJ mol⁻¹ = -750 kJ mol⁻¹

Therefore, the correct value for the standard enthalpy of formation for TiCl₄ (I) is -750 kJ mol⁻¹.

To find out more about standard enthalpy of formation, visit:

https://brainly.com/question/30264187

#SPJ1

Identify the Lewis acid and Lewis base in each of the reactions. - C1- + AICI3 --> AICI4- ____ _____- BF3 +F- --> BF4-____ _____- NH3 + H+ --> NH4+____ _____

Answers

Each reaction's Lewis acid and Lewis base are as follows:

AlCl3 is the Lewis acid in the reaction, whereas Cl- is the Lewis base. F- is the Lewis base and BF3 is the Lewis acid in the reaction Cl- + AlCl3 --> AlCl4- BF3 + F- --> BF4-

The Lewis base in this reaction is NH3, and the Lewis acid is H+. NH3 + H+ --> NH4+

Explanation: A Lewis acid acts as an electron pair acceptor in a Lewis acid-base reaction, whereas a Lewis base acts as an electron pair donor. In the initial reaction, Cl- provides AlCl3 with a pair of electrons, which AlCl3 accepts to produce AlCl4-. As a result, AlCl3 is the Lewis acid and Cl- is the Lewis base. In the subsequent response, F- provides two pairs. BF3 takes the electrons and transforms them into BF4-. Hence, the Lewis bases are F- and BF3, respectively. In the third reaction, H+ absorbs a pair of electrons from NH3 and forms NH4+ as a result. As a result, the Lewis bases are NH3 and H+.

learn more about Lewis acid  here:

https://brainly.com/question/15570523

#SPJ4

Explain ow accommodating and co
llaborating might resolve conflict and contribute to harmonious relationships during your grade 12 academic year​

Answers

Accommodating involves one party sacrificing their own interests to satisfy the other party's needs while collaborating involves both parties working together to find a mutually beneficial solution.

Conflicts can be quickly resolved and positive relationships between the parties involved by being accommodating. For instance, one student might decide to abandon their idea in favor of the other student's idea if two students in a group project have opposing opinions on how to approach a task. This can help the group get along better and avoid conflicts.

On the other hand, working together can result in creative answers that benefit both parties. When two people work together, they combine their distinctive perspectives and ideas, which can result in innovative solutions that neither party would have thought of on their own. For instance, if two students disagree on how to complete a group assignment, they can work together and combine their ideas to come up with a more thorough and workable solution.

Learn more about Accommodating

brainly.com/question/30492472

#SPJ4

to conduct the synthesis of iodosalicylamide, edward used 0.97 g of salicylamide (mw: 137.14 g/mol) and 1.63 g of sodium iodide (mw:149.89 g/mol). assuming the reaction yield is 100%, how many grams of iodosalicylamide (mw:263.03 g/mol) would be formed? round your answer to two decimal places.

Answers

The amount of iodosalicylamide synthesized in the reaction performed by Edward by using 0.97 g of salicylamide will be about 2.87 grams.

What is the mass of iodosalicylamide?

Iodosalicylamide is synthesized by reacting salicylamide and sodium iodide in the presence of an oxidant. Iodosalicylamide is used as a reagent to detect the presence of oxidizing agents.

To find the mass of iodosalicylamide produced, we must first determine the limiting reagent for the reaction. The limiting reagent is the one that is consumed entirely, preventing the reaction from continuing even though the other reactants are present. The limiting reagent is the one that produces the least amount of product.

Moles of salicylamide:

moles = mass / molar mass = 0.97 g / 137.14 g/mol = 0.00708 moles

Moles of sodium iodide:

moles = mass / molar mass = 1.63 g / 149.89 g/mol = 0.0109 moles

Since iodosalicylamide is formed in a 1:1 ratio with the limiting reagent, sodium iodide, the limiting reagent is sodium iodide. Therefore, the theoretical yield of iodosalicylamide is the same as the moles of sodium iodide used.

Moles of iodosalicylamide = 0.0109 mol

Mass of iodosalicylamide = moles × molar mass = 0.0109 mol × 263.03 g/mol = 2.87 g

Therefore, the mass of iodosalicylamide that would be formed, assuming 100% yield, is 2.87 g, rounded to two decimal places.

Learn more about Iodosalicylamide here:

https://brainly.com/question/24215415


#SPJ11

which type of atomic orbital can be described as having 2 lobes of electron density separated by a nodal plane?

Answers

The type of atomic orbital that can be described as having 2 lobes of electron density separated by a nodal plane is the P orbital.

In atomic theory, an atomic orbital is a mathematical function that describes the behavior of one electron in an atom. It is a region in space with a high probability of locating an electron.

There are 3 types of orbitals available in each sub-shell of an atom. The sub-shell in each shell can be used to predict the number of orbitals.

There are 1 s-orbital, 3 p-orbitals, 5 d-orbitals, and 7 f-orbitals available in the first, second, and third shells, respectively. The type of atomic orbital that can be described as having 2 lobes of electron density separated by a nodal plane is the P orbital.

Each P orbital has two lobes of electrons located on either side of the nucleus separated by a nodal plane. The lobes can be polarized, making them more or less prominent depending on the situation.

This configuration provides the P orbital with a unique geometry and makes it highly suitable for molecular bonding.

The P orbital has a total of three different orientations. Each orientation corresponds to a different direction in space in which the lobes can be located. The three orientations are Px, Py, and Pz.

Each P orbital can hold a maximum of 2 electrons.

To know more about atomic orbitals, refer here:

https://brainly.com/question/28240666#

#SPJ11

assuming the density of a 5% acetic acid by mass solution is 1.0 g/ml, determine the volume of the acetic acid solution necessary to neutralize 25.0 ml of 0.10 m

Answers

To determine the volume of a 5% acetic acid by mass solution necessary to neutralize 25.0 ml of 0.10 m is 300 mL

To calculate the volume of the acetic acid solution necessary to neutralize, you will use the formula:

M₁V₁ = M₂V₂

Where,

M₁ = molarity of acetic acid

V₁ = volume of acetic acid

M₂ = molarity of sodium hydroxide

V₂ = volume of sodium hydroxideInitially

You need to calculate the moles of NaOH in 25 ml of 0.10 M NaOH;

Molarity (M) = 0.10 M

Moles (n) = M × Vn = 0.10 × 25/1000n = 0.0025 mol of NaOH

To neutralize NaOH, you need the same number of moles of acetic acid;

1 mol of NaOH reacts with 1 mol of acetic acid0.0025 mol NaOH reacts with 0.0025 mol acetic acid

Concentration of acetic acid = 5%

Mass of acetic acid in 100 ml of solution = 5 g

Density of solution = 1.0 g/ml

Therefore, volume of acetic acid solution that is necessary to neutralize 25.0 ml of 0.10 m

V = (0.0025 mol acetic acid) x (60.05 g acetic acid/1 mol acetic acid) x (1/5 g acetic acid in 100 ml of solution) x (1000 ml/1 L) x (1/1.0 g/ml)

V = 0.30 L of acetic acid solution

V = 300 mL of acetic acid solution (3 significant figures)

Hence, the volume of the acetic acid solution necessary to neutralize 25.0 ml of 0.10 m is 300 mL.

Learn more about neutralize at https://brainly.com/question/15255706

#SPJ11

what is the empirical formula of a compound composed of 25.9 g of potassium ( k ) and 5.30 g of oxygen ( o )? insert subscripts as needed.

Answers

The empirical formula of a compound composed of 25.9 g of potassium (K) and 5.30 g of oxygen (O) is K2O. To calculate the empirical formula, we need to convert the given mass of the elements into moles. The molar mass of potassium is 39.09 g/mol and the molar mass of oxygen is 16.00 g/mol. Thus, 25.9 g of potassium is equivalent to 0.66 mol, and 5.30 g of oxygen is equivalent to 0.33 mol. To find the empirical formula, divide the moles of each element by the smallest number of moles, which is 0.33 mol in this case. This yields the ratio of 2:1 for potassium and oxygen, thus the empirical formula is K2O.

Explanation: The empirical formula of a compound composed of 25.9 g of potassium (K) and 5.30 g of oxygen (O) is K2O. Empirical formula is defined as the simplest formula of a compound that shows the ratio of atoms present in the compound. It can be determined by finding the lowest whole number ratio of atoms in the compound.

To determine the empirical formula of the compound containing potassium and oxygen, the following steps can be followed:

1. Convert the given mass of each element into moles by using the molar mass of each element:

Molar mass of K = 39.10 g/mol
Molar mass of O = 16.00 g/mol

Number of moles of K = 25.9 g / 39.10 g/mol = 0.662 moles
Number of moles of O = 5.30 g / 16.00 g/mol = 0.331 moles

2. Find the mole ratio of the two elements by dividing each value by the smaller number of moles:

Mole ratio of K : O = 0.662/0.331 = 2 : 1

3. Write the empirical formula using the mole ratio as subscripts:

Empirical formula = K2O

Therefore, the empirical formula of the compound composed of 25.9 g of potassium (K) and 5.30 g of oxygen (O) is K2O.

For more such questions on molar mass

https://brainly.com/question/20949039

#SPJ11

in fireworks, the heat of the reaction of an oxidizing agent, such as kclo4, with an organic compound excites certain salts, which emit specific colors. strontium salts have an intense emission at 641 nm. what is the energy (in kj) of this emission for 4.09 g of the chloride salt of strontium? assume that all the heat produced is converted to emitted light. enter to 2 decimal places. (mts 2/17/2018)

Answers

The energy emitted by 4.09 g of strontium chloride salt is 8.01 8.00 x 10⁻²⁴ kJ  (rounded to 2 decimal places).

What is the emission energy?

To determine the energy of the emission at 641 nm, we can use the formula:

E = hc/λ

where;

E is the energy, h is Planck's constant (6.626 x 10⁻³⁴ J·s), c is the speed of light (3 x 10⁸ m/s), and λ is the wavelength in meters.

First, we need to convert the wavelength from nanometers to meters:

641 nm = 641 x 10⁻⁹ m

Next, we can plug in the values and solve for E:

E = (6.626 x 10⁻³⁴J·s)(3 x 10⁸ m/s)/(641 x 10⁻⁹ m)

E = 3.10 x 10⁻¹⁹ J

To convert from joules to kilojoules, we divide by 1000:

E = 3.10 x 10⁻²² kJ

Now we can use the molar mass of the chloride salt of strontium to calculate the total energy released:

SrCl₂ has a molar mass of 158.53 g/mol, so 4.09 g is equivalent to:

n = 4.09 g / 158.53 g/mol

n = 0.0258 mol

The energy released by 0.0258 mol of strontium chloride at 100% efficiency is:

E_total = nE

E_total = (0.0258 mol)(3.10 x 10⁻²² kJ/mol)

E_total = 8.00 x 10⁻²⁴ kJ

Learn more about energy of emission here: https://brainly.com/question/24213957

#SPJ1

Why is a physical property not a characteristic of matter that you can’t observe or measure without changing the identity of matter

Answers

The answer is matter

Answer:

Characteristics of matter change due to chemical changes, not physical ones. Physical properties can be determined without changing the substance's chemical identity

Explanation:

Select all that happen through stomata (assume this question is about a plant which is actively photosynthesizing during the day).
-Water vapors exit leaves.
-Carbon dioxide enters leaves.
-Oxygen exits leaves.

Answers

The things which happen through stomata during photosynthesis include water vapors exit the leaves, carbon dioxide enters the leaves, and oxygen exits the leaves for the formation of glucose (carbohydrate). Thus, all are correct options.

What are stomata?

Stomata are small pores found on the surfaces of leaves, stems, and other plant parts that enable gas exchange between the atmosphere and the interior of the plant. During photosynthesis, stomata are important for regulating the flow of carbon dioxide and oxygen into and out of the plant. They also help to prevent water loss from the plant by controlling the opening and closing of the stomata.

When photosynthesis occurs, the plant uses energy from the sun to combine water and carbon dioxide to create glucose (a sugar) and oxygen. Stomata facilitate the uptake of carbon dioxide and the release of oxygen during photosynthesis. The water produced as a by-product of photosynthesis exits the plant through stomata via transpiration.

Thus, the three things that happen through stomata (assume this question is about a plant that is actively photosynthesizing during the day) are carbon dioxide entering the leaves, water vapors exiting the leaves, and oxygen exiting the leaves.

Therefore, all the options are correct.

Learn more about Stomata here:

https://brainly.com/question/14351755

#SPJ11

understand what are the effects when there is low [s], high [s], and when vo is one half of the vmax. biochem]

Answers

The effect of low [s] is that the rate of the reaction will decrease and the effect of high [s] is that the rate of the reaction will increase. When Vo is one-half of Vmax, the effect is that the reaction has reached its half-maximum velocity, or that the reaction has reached its maximum efficiency.

The rate of the reaction will decrease in the case of low [s] as the substrate concentration is too low to support the reaction. On the other hand, the rate of reaction will increase in the case of high [s] as there is a greater amount of substrate to drive the reaction.

To understand these effects in a better way, we can use the Michaelis-Menten equation to calculate the rate of reaction at various substrate concentrations (Vo and Vmax) and also the reaction's maximum velocity (Vmax):-

V = Vmax[S]/(Km + [S])

Where Vmax is the maximum velocity of the reaction, Km is the Michaelis constant, and [S] is the concentration of the substrate.

Learn more about Vmax:

https://brainly.com/question/14529099

#SPJ11

The volume of a gas is increased from 0.5L to 4.0 L while the temperature is held constant. Thepressure of the gas:A. increases by a factor of fourB. decreases by a factor of eightC. increases by a factor of eightD. increases by a factor of two

Answers

The volume of a gas is increased from 0.5L to 4.0 L while the temperature is held constant. The pressure of the gas decreases by a factor of eight.

Charles's Law- Charles's Law is a physical law that states that for a fixed mass of gas held at a constant pressure, the volume of the gas is directly proportional to the absolute temperature of the gas.

V1/T1=V2/T2 (Constant Pressure)

Boyle's Law- Boyle's law is a gas law that states that the pressure applied to a gas at a constant temperature is inversely proportional to the volume of the gas.

P1V1 = P2V2 (Constant Temperature)

What is the ideal gas law? The ideal gas law is a physical law that describes the behavior of an ideal gas in terms of its pressure, volume, temperature, and the number of particles present.

PV = nRT

Where: P = pressure, V = volumen = number of particles present, R = ideal gas constant, T = absolute temperature

What happens to the pressure of the gas when the volume of the gas is increased? The pressure of the gas decreases when the volume of the gas is increased while holding the temperature constant. Therefore, when the volume of the gas increases from 0.5L to 4.0 L while the temperature is held constant, the pressure of the gas decreases.

The correct answer is B. decreases by a factor of eight.

To learn more about "volume of a gas", visit: https://brainly.com/question/27100414

#SPJ11

Testing for Alcohols & Carboxylic Acids
1. The presence of a primary or secondary alcohol can be confirmed by reaction with acidified potassium
dichromate solution which changes colour from orange to green.
a) State the name formula of the reagent used to test for the presence of a primary/secondary alcohol.
b) State the colour change observed when this reagent reacts with an alcohol.
c) What type of compound is produced by the oxidation of a primary alcohol?
d) What type of compound is produced by the oxidation of a secondary alcohol?
e) Explain why the dichromate test does not work for tertiary alcohols such as methylpropan-2-ol.
Include the chemical structure of methylpropan-2-ol in your explanation.
2.a) Describe a simple chemical test for the presence of a carboxylic acid group in a molecule.
Reagent:
Observation:
b) Describe how you would confirm that the gas produced in this test is carbon dioxide.
c) Explain why, for a completely unknown compound, the hydrogencarbonate test is not conclusive proof
that a carboxylic acid group is present.

Answers

Answer:

a) Acidified potassium dichromate solution is used to test for the presence of a primary or secondary alcohol.

b) The orange color of the potassium dichromate solution is reduced to green when it reacts with an alcohol.

c) The oxidation of a primary alcohol produces a carboxylic acid.

d) The oxidation of a secondary alcohol produces a ketone.

e) The dichromate test does not work for tertiary alcohols because they cannot be further oxidized. Methylpropan-2-ol is a tertiary alcohol with the chemical structure:

CH3

|

CH3—C—OH

|

CH3

Since there are no hydrogen atoms attached to the carbon atom bearing the hydroxyl group, it cannot be oxidized.

a) A simple test for the presence of a carboxylic acid group is the addition of sodium hydrogencarbonate solution to the compound. The reagent reacts with the carboxylic acid to produce carbon dioxide gas.

Reagent: Sodium hydrogencarbonate solution

Observation: Effervescence (bubbling) due to the release of carbon dioxide gas.

b) To confirm that the gas produced in the hydrogencarbonate test is carbon dioxide, it can be tested with limewater. Carbon dioxide turns limewater milky/cloudy due to the formation of calcium carbonate.

c) The hydrogencarbonate test is not conclusive proof that a carboxylic acid group is present in a completely unknown compound because some other functional groups such as phenols and alcohols can also react with the reagent and produce carbon dioxide. Therefore, additional tests such as the dichromate test or Tollens' test may be needed to confirm the presence of a carboxylic acid group.

(please could you kindly mark my answer as brainliest and a follow would be really nice)

postcranial material from ardipithecus shows evidence only for a bipedal adaptatoin exclusively on the ground

Answers

Ardipithecus, an extinct hominin species that lived around 4.4 million years ago, holds a significant place in the study of human evolution due to its bipedal adaptation.

Bipedalism, or the ability to walk on two feet, is a defining characteristic of modern humans and their immediate ancestors. The discovery of bipedalism in Ardipithecus sheds light on the evolutionary history of human locomotion and provides insights into the origins of bipedalism in our lineage.

The evidence for bipedalism in Ardipithecus comes from postcranial material, or skeletal remains below the head. The analysis of these remains reveals features that are indicative of bipedal adaptation, such as the shape of the pelvis, femur, and foot.

These features are similar to those found in modern humans and other bipedal primates, and they suggest that Ardipithecus was capable of walking upright on two feet.

However, the bipedal adaptation in Ardipithecus seems to have been exclusively for ground-based locomotion. This is inferred from the absence of features that would suggest adaptations for arboreal, or tree-dwelling, locomotion, such as long arms, curved fingers, or grasping feet.

Instead, the postcranial features of Ardipithecus point towards an adaptation for life on the ground, indicating that this species likely did not spend much time in trees.

The bipedalism exhibited by Ardipithecus is significant because it provides important clues about the evolution of human locomotion. Bipedalism is considered a key factor in the evolution of early human ancestors, as it freed the hands for tool use and enabled more efficient movement on the ground.

The discovery of bipedalism in Ardipithecus suggests that this form of locomotion may have evolved earlier in the human lineage than previously thought, and that it may have initially been adapted for ground-based activities rather than arboreal activities.

Studying Ardipithecus and its bipedal adaptation also provides insights into the ecological and environmental context in which early humans lived.

The absence of arboreal adaptations in Ardipithecus suggests that this species inhabited open environments with less reliance on tree-dwelling behaviors.

This has implications for understanding the habitat and lifestyle of Ardipithecus, as well as the ecological factors that may have influenced the evolution of bipedalism in our lineage.

In conclusion, the discovery of bipedalism in Ardipithecus is a significant finding in the field of human evolution. It provides insights into the evolution of human locomotion and the origins of bipedalism in our lineage.

The bipedal adaptation in Ardipithecus appears to have been exclusively for ground-based locomotion, suggesting that this species likely did not spend much time in trees and was adapted for life on the ground.

Further research on Ardipithecus and its bipedal adaptation can help us better understand the evolutionary history of human locomotion and the ecological context in which our early ancestors lived.

To learn more about bipedalism, refer below:

https://brainly.com/question/31114646

#SPJ11

Which one of the following compounds is a non-electrolyte when dissolved in water?
Cu(NO3)2
CaCl2
HCl
NaCH3CO2
CCl4

Answers

The compound that is a non-electrolyte when dissolved in water is CCl4.

When CCl4 dissolves in water, it does not break down into ions, and it does not conduct electricity.What is an electrolyte?An electrolyte is a compound that dissolves in water, and its solution conducts electricity due to the presence of ions. A compound must dissociate in water to produce ions to be considered an electrolyte. The ions can move freely through the solution, allowing for the conduction of electricity.There are three types of electrolytes: strong electrolytes, weak electrolytes, and nonelectrolytes. Strong electrolytes dissociate fully into ions in water and conduct electricity very efficiently. Weak electrolytes only partially dissociate, and they conduct electricity less efficiently than strong electrolytes.Nonelectrolytes are substances that do not dissolve in water or dissolve but do not dissociate into ions. Because they do not have ions, they do not conduct electricity. CCl4 is a nonelectrolyte, as it does not produce any ions when it dissolves in water.

For more such questions on Non-electrolyte

https://brainly.com/question/15291583

#SPJ11

whats is called a physical and mental impairment resulting from the use of alcohol.

Answers

A physical and mental impairment resulting from the use of alcohol is called Alcohol Use Disorder (AUD).

AUD is a chronic disease characterized by a preoccupation with alcohol, increased tolerance to it, and physical dependence on it. Symptoms include intense cravings, withdrawal, and a loss of control over drinking. Long-term effects of AUD include liver damage, poor mental and physical health, and an increased risk of developing certain types of cancer. Treatment for AUD often involves therapy and medication to help with withdrawal symptoms, cravings, and the physical and mental impairments resulting from the use of alcohol.

For more questions on Alcohol Use Disorder

https://brainly.com/question/28286542

#SPJ11

Number of moles of Cl2 molecules in a sample that contains 7. 12×1025 molecules of Cl2

Answers

Number of moles of Cl2 molecules in a sample that contains 7. 12×1025 molecules of Cl2 is 118.2 moles.

To find out the number of moles of Cl2 molecules in a sample that contains 7.12 x 1025 molecules of Cl2, we can use the following formula:

moles = number of molecules / Avogadro's number

A mole is a unit of measurement that is used to calculate the quantity of a material. One mole of a material is the amount of that substance that has the same number of particles (atoms, molecules, or ions) as 12 grams of carbon-12. This particle number is known as Avogadro's number, and it is around 6.022 x 10^23 particles per mole.

Therefore, the calculation is:

moles = 7.12 x 10^25 / 6.022 x 10^23

moles = 118.2 moles

So, the number of moles of Cl2 molecules in the given sample is 118.2 moles.

For more such questions on moles, click on:

https://brainly.com/question/14357742

#SPJ11

determine the limiting reactant: naoh (aq) hcl (aq) --> h2o (l) nacl (aq) (balanced) 10 moles of naoh reacts with 12 moles of hcl.

Answers

NaOH (aq) + HCl (aq) → H2O (l) + NaCl (aq). The stoichiometric coefficient of NaCl is 1, so it will produce the same amount of moles as NaOH.

To determine the limiting reactant in this equation, the first step is to calculate the number of moles of each reactant available.

10 moles of NaOH and 12 moles of HCl are available, so we can use these values.

Then, we need to compare the calculated moles to the stoichiometric coefficients in the balanced equation.

The reactant that produces the least amount of product is the limiting reactant.

Let us begin with the number of moles of NaOH:

10 mol NaOH × (1 mol HCl / 1 mol NaOH) = 10 mol HCl

This means that if 10 mol of NaOH reacts, then 10 mol of HCl is also consumed.

Next, we calculate the number of moles of HCl available:

12 mol HCl × (1 mol NaOH / 1 mol HCl) = 12 mol NaOH

So if 12 mol of HCl is reacted, then 12 mol of NaOH is consumed.

Since we have more HCl than NaOH, the limiting reactant is NaOH.

Therefore, NaOH is the limiting reactant in this reaction.

We can also determine the maximum amount of NaCl that can be produced from this reaction by using the moles of NaOH. The stoichiometric coefficient of NaCl is 1, so it will produce the same amount of moles as NaOH.

Therefore, 10 mol of NaOH can produce a maximum of 10 mol of NaCl.

Learn more about limiting reactants: https://brainly.com/question/26905271

#SPJ11

Classify each substance as a strong acid, strong base, weak acid, or weak base. Drag the appropriate items to their respective bins NH3 HCOOH KOH CSOH CH3NH2 HF (CH3)2NH HI CH COOH HCIO Strong acids:Weak acids: Strong bases:Weak bases:

Answers

The given substances are listed as follows strong acids as HCIO, HI; weak acids as [tex]CH_3COOH[/tex], [tex]CH_3NH_2[/tex], HCOOH, HF; strong bases as KOH, CSOH and weak bases as [tex]NH_3(CH_3)_2NH[/tex].

Substances are classified into four types strong acids, weak acids, strong bases, and weak bases.

Strong acids: Strong acids are acidic substances that have high ionization capacity. These acids are said to be strong acids because they have a pH of less than 7.0. HCl, [tex]H_2SO_4[/tex], and [tex]HNO_3[/tex] are examples of strong acids.Weak acids: Weak acids are acidic substances that have a low ionization capacity. These acids are said to be weak acids because they have a pH of greater than 7.0. [tex]CH_3COOH, CH_3NH_2,[/tex] HCOOH and HF are examples of weak acids.Strong bases: Strong bases are basic substances that have a high degree of ionization capacity. These bases are said to be strong bases because they have a pH of greater than 7.0. NaOH, KOH, and [tex]Ca(OH)_2[/tex] are examples of strong bases.Weak bases: Weak bases are basic substances that have a low degree of ionization capacity. These bases are said to be weak bases because they have a pH of less than 7.0. [tex]NH_3[/tex] and [tex](CH_3)_2NH[/tex] are examples of weak bases.

Learn more about strong acids: https://brainly.com/question/30900251

#SPJ11

If the reaction quotient (Q) is smaller than the equilibrium constant (K) for a reaction then which way will the reaction proceed? a. The reaction is at equilibrium and the reaction will proceed at equal rates in the reverse and forward direction. b. The reaction will proceed to the right (products side) c. The reaction equation is required to answer this question d. The reaction will proceed to the left( reactants side)

Answers

The answer to the question is option b. The reaction will proceed to the right (product side) when the reaction quotient (Q) is smaller than the equilibrium constant (K).

A chemical reaction will not proceed spontaneously in the forward direction if Q is larger than K. The reaction will proceed spontaneously in the forward direction if Q is less than K. The reaction will be at equilibrium if Q is equal to K.

According to Le Chatelier's principle, when Q is less than K, the system will shift to the right in order to reach equilibrium. This signifies that the reaction will continue to generate products until equilibrium is achieved.

What is the meaning of the reaction quotient (Q)?

The reaction quotient (Q) is a measure of the relative amounts of products and reactants in a chemical reaction that is not in equilibrium. The reaction quotient is determined in the same manner as the equilibrium constant (K) using molar concentrations or partial pressures of reactants and products. The only difference is that the reaction quotient is calculated at any point in the reaction, not just at equilibrium.

Therefore, if the reaction quotient (Q) is smaller than the equilibrium constant (K) for a reaction, the reaction will proceed to the product side with a tendency to achieve equilibrium.

To know more about the equilibrium constant, refer here:

https://brainly.com/question/10038290#

#SPJ11

write appropriate balanced net ionic equations for each of the following processes. a3. concentrated nitric acid oxidizes cu(s) to cu2 (aq):

Answers

The net ionic equation for the given process is

Cu + 4HNO3 → Cu(NO3)2 + 2NO2 + 2H2O

Concentrated nitric acid oxidizes copper metal to copper ions. The balanced chemical equation for this reaction is as follows.

3Cu + 8HNO3 → 3Cu(NO3)2 + 2NO + 4H2O

The net ionic equation is obtained by eliminating spectator ions from the balanced ionic equation. Only the species that take part in the reaction are included in the net ionic equation. The complete ionic equation is obtained by writing all the soluble compounds as ions.

3Cu + 8H+ + 8NO3- → 3Cu2+ + 6NO3- + 2NO + 4H2O

Only Cu2+ and NO3- ions are changing from reactants to products, so they are included in the net ionic equation.

The net ionic equation is as follows.

Cu + 4HNO3 → Cu(NO3)2 + 2NO2 + 2H2O.

To learn more about "balanced net ionic equation", visit: https://brainly.com/question/30051249

#SPJ11

determine the ka value for an acid where a 0.22 m solution has a measured ph of 2.98. enter your answer in scientific notation with two significant figures.

Answers

The Ka value is 2.2x10⁻³ in scientific notation with two significant figures.

To explain in brief, Ka is the acid dissociation constant that measures the strength of an acid.

The formula is used to find the value of the Ka constant when we have the molar concentration and the pH of the solution.

The calculation is done as follows:

Ka = [H₃O⁺]² / [HA]

Here, H₃O⁺ is the hydronium ion, which is formed when an acid is dissolved in water, and HA represents the acid.

Therefore, in order to determine the Ka value, we need to find the concentration of H₃O⁺ ions in the given solution.

Since pH = - log[H₃O⁺],

we can calculate [H₃O⁺] as follows:

2.98 = -log[H₃O⁺] = 10⁻²⁹⁵ = 1.28 × 10⁻³ M

Now, we can use the formula to find Ka:

Ka = [H₃O⁺]² / [HA]

= (1.28 × 10⁻³))² / 0.22

= 2.2 × 10⁻⁵

Therefore, the Ka value for the given acid is 2.2 × 10⁻⁵.

Learn more about dissociation constants here:

https://brainly.com/question/30930515

#SPJ11

which chemical does the brain produce that makes people feel good when they exercise?

Answers

The chemical that the brain produce that makes people feel good when they exercise is dopamine and endorphins.

What are endorphins?

Endorphins are any of a group of peptide hormones found in the brain that act as neurotransmitters and have properties similar to morphine.

A neurotransmitter is any substance, such as acetylcholine or dopamine, responsible for sending nerve signals across a synapse between two neurons.

When you exercise, your body releases chemicals such as dopamine and endorphins in your brain that make you feel happy.

Learn more about endorphins at: https://brainly.com/question/28138527

#SPJ1

Other Questions
one effect of nat turner's rebellion was a. the u.s. senate's call for an end to slavery b. the establishment of mediation boards to hear slaves' complaints c. the creation of antislavery societies throughout the lower south d. the victory of the whig party in the election of 1840 e. the decline in the number of slaves freed in the south The alpha level is set _____ the analysis of the data. Use the following Distributions tool to identify the boundaries that separate the extreme samples from the samples that are more obviously consistent with the null hypothesis. Assume the null hypothesis is nondirectional, meaning that the critical region is split across both tails of the distribution. The z-score boundaries at an alpha level alpha = .05 are: z = 1.96 and z = -1.96 z = 3.29 and z = -3.29 z = 2.58 and z = -2.58 To use the tool to identify the z-score boundaries, click on the icon with two orange lines, and slide the orange lines until the area in the critical region equals the alpha level. Remember that the probability will need to be split between the two tails. To use the tool to help you evaluate the hypothesis, click on the icon with the purple line, place the two orange lines on the critical values, and then place the purple line on the z statistic. The critical region is _____. The z-score boundaries for an alpha level a = .001 are: z = 2.58 and z = -2.58 z = 1.96 and z = -1.96 z = 3.29 and z = -3. 29 Suppose that the calculated z statistic for a particular hypothesis test is 2.64 and the alpha is .001. This z statistic is _____ the critical region. Therefore, the researcher _____ reject the null hypothesis, and he ______ conclude the alternative hypothesis is probably correct. A certain computer loses half of its value every four years. If the value of the computer after 6 years is $835, what was the initial value of the computer? which of the following are examples of resistance to persuasion based on previous commitments and which are not? any constituent who has a claim in some aspect of a company's products, operations, markets, industry, or outcomes is known as what? question 21 options: a) manager b) shareholder c) partner d) customer e) stakeholder why did gandhi become such an influential leader in the indian independence movement? I guess not 2 more question? An order______ is a salesperson who identifies prospective customers, provides them with information, persuades them to buy, and follows up with them about the use of the product.getter Perpetrators of domestic abusers?Are most perpetrators of domestic abuse narcissist or personality disordered? The population of a place is increased to 54000 in year 2003 5% per annum find the population in the year 2001 what would be the population in the year 2005 mastering astronomy based on current evidence, how common are planetary systems? based on current evidence, how common are planetary systems? all stars should have planets orbiting around them. only 10 % of stars have planetary systems. about 70 % of stars have planetary systems. almost exactly half of stars have planetary systems. TRUE OR FALSE Employees in countries that rank high on power distance are more likely to prefer a consultative, participative leadership style. Mass mA rests on a smooth horizontal surface, mB hangs vertically.(a) If mA=11.0 kg and mB=7.0 kg, determine the magnitude of the acceleration of each block.(b) If initially mA is at rest 1.300 m from the edge of the table, how long does it take to reach the edge of the table if the system is allowed to move freely?(c) If mB=1.0 kg, how large must mA be if the acceleration of the system is to be kept at over 1/100 g? 16. El Dorado Tire Company fired Bill Ballard, a sales execu-tive. Ballard had a five-year contract with El Dorado butwas fired after only two years of employment. Ballardsued El Dorado for breach of contract. El Dorado claimedthat any damages due to breach of the contract should bemitigated because of Ballard's failure to seek other employ-ment after he was fired. El Dorado did not provide anyproof showing the availability of comparable employment.Explain whether El Dorado is correct in its contention. with the cares act costing over $2 trillion and the federal government facing a significant decline in tax revenue, explain the effectiveness of fiscal policy using the three claims outlined in the chapter. Illustration hkw echolocation works for the bat. How does thisHelp the bat? Which hydrocarbon has all of its atoms in the same plane?A) C2H6B) CH4C) C2H4D) C3H4 What is an abiotic factor that can prevent the organism from becoming preserved, AFTER it has been buried?Answer options:1. Groundwater2. Predators & animals that eat bones.3. Scavengers & plants that use the nutrients of fossils.4. Other animals of the same species as the organism that died. Stock sold at 23 7/8 at the start oftrading. It was up 3 1/2 points at theend of trading. What was the priceat the end of trading? p55. a 0.900 v potential difference is maintained across a 1.50 m length of tungsten wire that has a cross-sectional area of 0.600 mm . what is the2 current in the wire?