Assuming that all is working properly, which of the following is at a higher energy level?

Answers

Answer 1

If all is working correctly, the electron in a higher orbital or shell will have more energy than the electron in a lower orbital or shell. The following statement is correct: The electron that is farther away from the nucleus is at a higher energy level.

In order for the electron to escape from the atom, it must be excited, meaning that it must absorb energy. When this occurs, the electron moves to a higher energy level, which is farther from the nucleus. Because the electron is now in an excited state, it is more vulnerable to being released from the atom if additional energy is provided to it. According to Bohr's model of the atom, electrons revolve around the nucleus in circular orbits with varying energy levels. As the distance between the nucleus and the electron increases, so does the energy level of the electron. The energy of electrons in the first energy level is the lowest, and as the energy level increases, so does the energy of electrons. As a result, electrons in the outermost shell have the highest energy levels.

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Related Questions

fill in the blank. every___will have its own unique set of quantum numbers. select the correct answer below: atom shell of electrons proton individual electron

Answers

Every atom shell of electrons will have its own unique set of quantum numbers. So the correct option is A.

This is due to the fact that each electron has a unique set of four quantum numbers that define its position and energy in an atom: principal quantum number (n), angular momentum quantum number (l), magnetic quantum number (mℓ), and spin quantum number (ms). These quantum numbers determine the state of the electron and its position within the atom. Each electron has a unique set of quantum numbers, making each atom shell of electrons have its own unique set of quantum numbers.

So the correct option is A.

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Conclusions
1. What conclusions can you draw about how temperature and salinity affect the flow of water Write an
evidence-based claim
Type your answer here:
I
2. Draw a diagram (develop a model) that shows what happens when warm water mixes with cold water in the
ocean. Use your model to explain how this causes ocean currents.
Type your answer here:

Answers

1. Temperature and salinity affect the flow of water in the ocean by creating density differences that drive ocean currents.

2. [image of warm and cold water mixing and creating a convection cell is mentioned below]

When warm water mixes with cold water in the ocean, a convection cell forms. Warm water rises and cold water sinks, which drives ocean currents. This process is influenced by other factors such as wind, Earth's rotation, and the shape of ocean basins.

What is density?

Density refers to the amount of mass per unit volume of water. At standard conditions (temperature of 4 degrees Celsius and pressure of 1 atmosphere), the density of pure water is approximately 1 gram per cubic centimeter (g/cm³). However, the density of water can vary depending on its temperature and salinity.

What is convection cell?

A convection cell is a circular pattern of fluid movement that arises when warm fluid rises and cold fluid sinks in a circular motion, creating a loop or cell. In the context of oceanography, convection cells can be formed when warm water rises and cold water sinks, either due to differences in temperature or salinity.

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what is the independent variable and the dependent variable in which cleans teeth better baking soda or toothpaste project.

Answers

Answer:

The dependent variable would be the whitening of the teeth of the participants.

Explanation:

If this sample “unlabelled graph” were used from this experiment - how could we label each portion of the graph? What type of relationship do we see?

Answers

Typically, you must identify the x- and y-axes, which represent the two variables being measured or compared, in order to label a graph.

How can you identify Variables in graph?

The graph's shape must be examined in order to determine the type of relationship between the variables. The relationship is considered to be linear if the graph depicts a straight line. The relationship is non-linear if the graph shows a curve. To determine whether the relationship is positive or negative, you would also need to look at the line's slope and direction. The relationship is positive if the line slopes upwards from left to right; this indicates that as one variable rises, so does the other. The relationship is negative if the line slopes downward from left to right, indicating that one variable increases while the other decreases.

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How many silicon atoms are in a piece of glass weighing 6.240

Answers

Assuming that the glass is made entirely of silicon dioxide (SiO2), which is a common component of glass, we can calculate the number of silicon atoms based on the molecular weight of SiO2 and the weight of the glass.

How many silicon atoms are in a piece of glass weighing 6.240?

The molecular weight of SiO2 is approximately 60 g/mol. Therefore, 6.240 g of SiO2 corresponds to:

6.240 g SiO2 × (1 mol SiO2/60 g SiO2) = 0.104 mol SiO2

Since each molecule of SiO2 contains one silicon atom, the number of silicon atoms in the piece of glass can be calculated by multiplying the number of moles of SiO2 by Avogadro's number (6.022 × 10^23 atoms/mol):

0.104 mol SiO2 × (6.022 × 10^23 atoms/mol) = 6.26 × 10^22 silicon atoms

Therefore, there are approximately 6.26 × 10^22 silicon atoms in a piece of glass weighing 6.240 g, assuming the glass is made entirely of SiO2.

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Polar air is often described as dry even though the relative humidity is high. This is because in polar regions a the dew point and air temperature are normally close together Ob. there is a large separation between dew point and air temperature c. the air has a high absolute humidity Od there is a high dew point temperature

Answers

Polar air is often described as dry because there is a large separation between the dew point and air temperature. This occurs because the air is usually very cold and has a low absolute humidity.


Polar air is often described as dry even though the relative humidity is high. This is because in polar regions there is a large separation between dew point and air temperature.In polar regions, the air is very cold, and therefore has very little moisture. This means that the relative humidity of the air is very high, but the actual amount of moisture in the air is very low. This is because cold air cannot hold as much moisture as warm air. When the temperature of the air drops, the amount of moisture that it can hold also decreases.

As a result, the relative humidity of the air increases, even though the actual amount of moisture in the air is very low.

The relative humidity is high because the dew point and air temperature are close together. This means that the amount of water vapor in the air is low, making it feel dry.

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Which of the following substances has the greatest solubility in water? BaF2, Kp = 1.5 x 10-6 Ca(OH)2, Ksp - 6,5 x 10-6 SrCros. Ksp = 2.2 x 10-5 Ag2SO4, Ksp - 1.5 x 10-5 Zn(103)2, Ksp = 3.9 x 10-6

Answers

The substance with the greatest solubility in water is Ag2SO4, with a Ksp of 1.5 x 10-5.

The solubility of a substance is determined by its solubility product constant (Ksp). The higher the Ksp value, the more soluble the substance is in water.

Ksp is the equilibrium constant for a slightly soluble salt in a saturated solution. It is used to calculate the maximum concentration of ions in a solution at equilibrium. When a solid salt dissolves in water, it dissociates into its constituent ions.

The given values of Ksp for the substances are as follows:

BaF2, Kp = 1.5 x 10^-6

Ca(OH)2, Ksp - 6.5 x 10^-6

SrCros. Ksp = 2.2 x 10^-5

Ag2SO4, Ksp - 1.5 x 10^-5

Zn(103)2, Ksp = 3.9 x 10^-6

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Which of the following monoalkylbenzenes undergo nitration in HNO3/H2SO4 to yield a product mixture with the highest ortho : para ratio?ethylbenzenepropylbenzenetert-butylbenzenetoluene

Answers

Option (d) is correct. Toluene undergo undergo nitration in HNO3/H2SO4 to yield a product mixture with the highest ortho : para ratio. Because toluene has less steric hindrance.

Toluene is defined as a substituted aromatic hydrocarbon. Toluene is a colorless, water-insoluble liquid with the smell associated with paint thinners. Toluene is a mono-substituted benzene derivative consisting of a methyl group attached to a phenyl group. The IUPAC name of toluene is methylbenzene. Steric hindrance is defined as the slowing of chemical reactions due to steric bulk. Steric hindrance manifested in intermolecular reactions whereas discussion of steric effects often focus on intramolecular interactions. It is often exploited to control selectivity such as slowing unwanted side-reactions.

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The complete question is,

Which of the following mono alkyl benzenes undergo nitration in HNO3/H2SO4 to yield a product mixture with the highest ortho : para ratio ?

A. ethylbenzene

B. propyl benzene

C. tert-butylbenzene

D. toluene

given the atomic mass of hydrogen is 1 amu, the atomic mass of oxygen is 16 amu, and one molecule of sulfuric acid has a mass of 98 amu, what is the atomic mass of sulfur trioxide?

Answers

The atomic mass of sulfur trioxide (SO3) is 82 amu.

How to find the atomic mass of sulfur trioxide ?

Sulfur trioxide (SO3) has one sulfur atom and three oxygen atoms.

The atomic mass of sulfur can be calculated by subtracting the total mass of the oxygen atoms in sulfuric acid (3 x 16 amu) from the mass of sulfuric acid (98 amu) and then subtracting the mass of the remaining oxygen atom:

Mass of sulfur = (98 amu - 3 x 16 amu) - 1 x 16 amuMass of sulfur = (98 amu - 48 amu) - 16 amuMass of sulfur = 34 amu

The atomic mass of sulfur is 34 amu.

To find the atomic mass of sulfur trioxide, we add the atomic masses of one sulfur atom and three oxygen atoms:

Atomic mass of SO3 = 1 x 34 amu + 3 x 16 amuAtomic mass of SO3 = 34 amu + 48 amuAtomic mass of SO3 = 82 amu

Therefore, the atomic mass of sulfur trioxide (SO3) is 82 amu.

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Use the following data to determine whether the conversion of diamond into graphite is exothermic or endothermic:
C diamond (s) + O2 (g) ? CO2(g) ?H° = -395.4 kJ
2 CO2 (g) ? 2 CO(g)+O2 (g) ?H° = 566.0 kJ
2 CO2(g) ? Cgraphite(s) + CO2 (g) ?H° =-172.5 kJ
Cdiamond (s) ? Cgraphie (s) ?H°= ?

Answers

It's a negative value for ∆H°, indicating that the conversion of diamond to graphite releases energy. As a result, it is an exothermic reaction.

The conversion of diamond into graphite is exothermic. The enthalpy change of the reaction is -267.1 kJ.There are three reactions that take place in this process. Cdiamond (s) + O2 (g) → CO2(g) ∆H° = -395.4 kJ2 CO2 (g) → 2 CO(g)+O2 (g) ∆H° = 566.0 kJ2 CO2(g) → Cgraphite(s) + CO2 (g) ∆H° =-172.5 kJCdiamond (s) → Cgraphite (s) ∆H°= ?

The conversion of diamond to graphite is an endothermic process. It has a positive value of ∆H°. Therefore, the heat is absorbed by the surroundings. According to the first two reactions, the formation of CO and CO2 from the combustion of diamonds produces energy.

The net reaction for the conversion of diamond to graphite takes place as follows:

Diamond (s) + 2 O2(g) → Cgraphite (s) + 2 CO2 (g)

The energy change for this reaction can be determined by combining the above three reactions. The enthalpy change is obtained by subtracting the sum of the enthalpies of the reactants from the sum of the enthalpies of the products. The enthalpy change of the reaction is calculated as follows:

∆H°=ΣH°(products)−ΣH°(reactants)

∆H°=(−172.5)+(2×−393.5)+(566.0)−[(0)+(0)+(-395.4)+(2×0)]

∆H°=−267.1 kJ

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which of the following elements is the most difficult to ionize? select the correct answer below: fr h he xe

Answers

The He element is the one that is hardest to ionize.

The correct answer is He.

Why is it called elements?

An object is categorised as an element if it cannot be reduced to a simpler form. It is possible to recognise them by their particular atomic number. The elements are organised into groups in the periodic table based on their atomic numbers, and those having related characteristics are underlined.

What components comprise the elements?

An element is any substance made entirely of a certain type of atom, which are the building blocks of all matter. We know that each element is composed of protons, neutrons, and electrons. Some of the tiniest components in all of nature are these.

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How can we use liquid nitrogen? What are the purposes of using liquid nitrogen?​

Answers

Answer:

Liquid nitrogen can be used to freeze biological tissue. Liquid nitrogen is -210°C which will stop all biological decomposition in the tissue and preserve it.

Explanation:

Answer:Liquid nitrogen is a very cold and versatile chemical which has numerous uses in applications such as cooling, cryogenics, material preservation, and other industrial processes. Its incredibly low temperature (-196 degrees Celsius/-320 degrees Fahrenheit) makes it an excellent coolant and refrigerant for various materials. These uses can range from food preservation to semiconductor production. It is also used as a cryogenic in medical procedures such as cryosurgery and as a propellant in rocket fuel.

The enthalpy of vaporization for water is 40.7 kJ/mol. Water has a vapor pressure of 101.3 kPa at 100.0 oC. Using the Clausius-Clapeyron equation, what is the vapor pressure for methanol at 44.6 oC? Give your answer in kPa, to the first decimal point.

Answers

The vapor pressure for methanol at 44.6°C is 36.2 kPa.

How do we calculate?

The Clausius-Clapeyron equation has a relation to the vapor pressure of a substance to its enthalpy of vaporization and temperature and is expressed :

ln(P2/P1) = -(ΔHvap/R) x (1/T2 - 1/T1)

given values are:

P1 = 101.3 kPa

T1 = 100.0°C = 373.2 K

ΔHvap = 40.7 kJ/mol

R = 8.314 J/(mol K)

r P2 at T2 = 44.6°C = 317.8 K:

ln(P2/101.3) = -(40.7 x 10^3 J/mol / (8.314 J/(mol K) x 317.8 K)) x (1/317.8 K - 1/373.2 K)

ln(P2/101.3) = -3.04

P2/101.3 = e^(-3.04)

P2 = 36.2 kPa

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What is the experimental mole ratio of baking soda (NaHCO3 ) to sodium chloride (NaCl)?

Answers

Answer: 1:1

Explanation:

Since Na trades place with Na it makes it 1:1

Blood is an example of a basic buffer system. Which of the following could be used to mimic the buffering abilities of blood?
Select the correct answer below:
HF and NaF
CH3NH2 and CH3NH3Cl
KOH and H2O
none of the above

Answers

Using CH3NH2 and CH3NH3Cl, one may simulate the blood's buffering properties. A weak acid and its conjugate base, or a weak base and its conjugate acid, make up a buffer system.

Which of the following best describes the blood's buffer system?

Carbonic acid and sodium bicarbonate. Hint: Human blood has a buffer of bicarbonate anion (HCO3) and carbonic acid (H2CO3) to keep the blood's pH between 7.35 and 7.45. Blood pH values higher or lower than 7.8 or 6.8 can be fatal.

Is blood an illustration of a fundamental buffer system?

Bicarbonate anion and hydronium are in equilibrium with carbonic acid in this buffer. A weak acid and its conjugate base, or a weak base and its conjugate acid, make up a buffer.

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Answer:

CH3NH2 and CH3NH3Cl

Explanation:

Methylamine (CH3NH2) is an organic base. In order to produce a basic buffer solution similar to blood, we can combine this base with a soluble salt of its conjugate acid, such as CH3NH3Cl. The solution of KOH and H2O would not be a good buffer because KOH is a strong base. The solution of HF and NaF is a buffer, but the pKa of HF is about 3.2, which is far from the pH of blood, 7.4.

When the hydronium ion concentration of a solution is increased
by a factor of 10, the pH value of the solution
(1) decreases 1 pH unit
(2) decreases 10 pH units
(3) increases 1 pH unit
(4) increases 10 pH units

Answers

Answer:

The correct answer is:

(1) decreases 1 pH unit

If only 1600 grams of CO2 are produced, what is the percent error of this reaction?

Answers

Answer:

Take 1600grams divide by 2

or the substituted cyclohexane compound shown, identify the atoms that are cis to the hydroxyl (oh) substituent.

Answers

The atoms that are cis to the hydroxyl (OH) substituent are the two carbon atoms in the ring that are directly adjacent to the OH group.


Cis-trans isomerism is a word used in chemistry that refers to the spatial arrangement of atoms within molecules. It is also known as geometric isomerism or configurational isomerism. The Latin prefixes "cis" and "trans" mean, respectively, "this side of" and "the other side of." Trans conveys that the functional groups (substituents) are on the opposite (transverse) sides of some plane, whereas cis implies that they are on the same side of some plane in the context of chemistry.

Cis-trans isomers are examples of stereoisomers, which are pairs of molecules with the same formula but distinct functional groups oriented in three dimensions. The absolute stereochemical explanation of E-Z isomerism does not necessarily equate to cis-trans notation.

The hydroxyl group (-OH) is attached to carbon number 1. The cis atoms are those that are attached to the same side of the ring. There are two atoms that are cis to the hydroxyl (OH) substituent, and these are atoms number 2 and 3. Therefore, the atoms that are cis to the hydroxyl (OH) substituent are atoms number 2 and 3 .

Thus, the cis to the hydroxyl (OH)  is (B) 2 and 3.

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Using C2H4 + 3 O2 -> 2 CO2 + 2 H2O.
What is the limiting reactant for this equation based on the previous question?

Answers

There is no limiting reactant because both reactants produce the same amount of products indicating that neither reactant is in excess and both are fully consumed in the reaction.

What is a limiting reactant?

The limiting reagent is described as  the reactant that is completely used up in a reaction, and thus determines when the reaction stops.

calculating the number of moles of each reactant of the equation:

C2H4 + 3 O2 -> 2 CO2 + 2 H2O.

Moles of C2H4: not given, assume 1 mole

Moles of O2: 3 moles (given in the equation)

Moles of CO2 produced by 1 mole of C2H4: 2 moles (from the balanced equation)

Moles of H2O produced by 1 mole of C2H4: 2 moles (from the balanced equation)

Moles of CO2 produced by 3 moles of O2: 2 x 3/3 = 2 moles (from the balanced equation)

Moles of H2O produced by 3 moles of O2: 2 x 3/3 = 2 moles (from the balanced equation)

In conclusion, both reactants produce the same amount of products (2 moles of CO2 and 2 moles of H2O).

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There are two naturally occurring isotopes of uranium. Uranium-238 and uranium-235. Uranium-238 has a percent abundance of 99.7% uranium-235 had a percent abundance of 0.3%. What is the atomic mass of uranium?

Answers

The atomic mass of uranium would be approximately 238.453 u.

Atomic mass calculation

To calculate the atomic mass of uranium, we need to take into account the percent abundance and mass of each isotope.

The atomic mass of an element is calculated by taking the weighted average of the masses of each isotope, where the weighting factor is the percent abundance of each isotope.

Let's begin by calculating the contribution of each isotope to the atomic mass of uranium:

Uranium-238 (238.050788 u): 99.7% abundanceUranium-235 (235.043929 u): 0.3% abundance

To calculate the atomic mass, we can multiply the mass of each isotope by its percent abundance (in decimal form), and then add the products together:

Atomic mass of uranium = (238.050788 u x 0.997) + (235.043929 u x 0.003)

Atomic mass of uranium = 237.748013 u + 0.705132 u

Atomic mass of uranium = 238.453 u

Therefore, the atomic mass of uranium is approximately 238.453 u.

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draw the possible e1 product(s) for the following reactions. do not draw the leaving group or counterion. ignore zaitsev's rule.

Answers

The possible e₁ product of the given reaction is given below in the  image format.

Alkene products are produced in mixes via the elimination process. According to Zaitsev's rule, base-induced elimination results in the primary alkene product being the more strongly substituted double bond.

An chemical process known as a unimolecular elimination (E1) produces a double bond by removing an H-X substituent from an organic molecule. Because the creation of the carbocation intermediate (similar to an SN1 reaction) from simply the X substituent departing on its own is the reaction's rate-limiting step, it is unimolecular in nature:

A two-step process called an E1 elimination reaction uses a carbocation intermediate:

The elimination of the departing group is the mechanism's initial phase. In this instance, the bromine is the departing group.

The removal of a proton and creation of a double bond constitute the mechanism's second stage. The three substituents on the carbocation in this instance are all equivalent. The mechanism is demonstrated below:

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Co(NH3)6³ has a maximum absorbance in the UV-Vis of 475 nm and appears yellow-
orange. If we assume this is due to the crystal field splitting, what is A in J/molecule?
What is A in kJ/mole?

Answers

The molar absorptivity A for Co(NH3)6³ at 475 nm is 251.5 kJ/mol.

What is Molar Absorptivity?

Molar absorptivity, also known as molar extinction coefficient, is a measure of how strongly a substance absorbs light at a particular wavelength. It is defined as the absorption coefficient divided by the concentration of the absorbing species and the path length of the sample:

To calculate A in J/molecule, we can use the formula:

A = hc / λmax

where A is the molar absorptivity in J/molecule, h is Planck's constant (6.626 x 10^-34 J s), c is the speed of light (2.998 x 10^8 m/s), and λmax is the wavelength of maximum absorbance in meters.

Converting the wavelength of maximum absorbance from nm to meters, we have:

λmax = 475 nm * (1 m / 10^9 nm) = 4.75 x 10^-7 m

A = (6.626 x 10^-34 J s) * (2.998 x 10^8 m/s) / (4.75 x 10^-7 m)

= 4.18 x 10^-17 J/molecule

Therefore, the molar absorptivity A for Co(NH3)6³ at 475 nm is 4.18 x 10^-17 J/molecule.

To convert this value to kJ/mol, we can use the formula:

A (kJ/mol) = A (J/molecule) * N (Avogadro's number) / 1000

where N = 6.022 x 10^23 mol^-1 is Avogadro's number.

Substituting the values, we get:

A (kJ/mol) = (4.18 x 10^-17 J/molecule) * (6.022 x 10^23 mol^-1) / 1000

= 251.5 kJ/mol

Therefore, the molar absorptivity A for Co(NH3)6³ at 475 nm is 251.5 kJ/mol.

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Which is an example of Conduction?
A Warm air rising, cooling at high temperatures, and then falling back to lower elevations.
B Warming your hands by a fire.
C The sun warming your face
D Burning your mouth on a hot spoon

Answers

Burning your mouth on a hot spoon(option D) is an example of heat transfer through conduction, as the spoon is in direct contact with your mouth.

What is conduction?

Conduction is the transfer of heat or electrical energy between two objects that are in direct contact with each other, or between two parts of the same object that are at different temperatures.

In conduction, the energy transfer occurs due to the collision of molecules in the objects or materials. When two objects are in contact, the molecules of the warmer object vibrate more rapidly, colliding with the molecules of the cooler object, which have less energy.

These collisions transfer thermal energy from the warmer object to the cooler object, until both objects reach the same temperature.

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1. What volume of hydrogen gas at STP is produced from the
reaction of 50.0g of Mg and 75.0 grams of HCl? How much
of the excess reagent is left over (in grams)?

Answers

Answer:

1.03 mol of dihydrogen gas will evolve, with a volume slightly over 22.4 dm3 at ST P. Explanation: Moles of magnesium: 50.0 ⋅ g 24.31 ⋅ g ⋅ mol−1 = 2.06 mol Moles of hydrogen chloride gas: 75.0 ⋅ g 36.2⋅ g ⋅ mol−1 = 2.07 mol

Explanation:

HOPE THAT HELPS ! <3

Which of the following describes a primary difference between distributive bargaining and interest-based bargaining?(1 point)

1. Interest-based bargaining is a type of negotiation.
2. Distributive bargaining seeks a solution that is beneficial to all parties.
3. Distributive bargaining is a type of negotiation.
4. Interest-based bargaining seeks a solution that is beneficial to all parties.

ECONOMICS! PLEASE HELP!

Answers

The primary distinction between these two negotiation strategies is that distributive negotiation does not take into consideration the demands of the other party when negotiating a settlement.

Which of the following statements most accurately describes an instance of distributive bargaining?

In a competitive negotiation style known as distributive bargaining, one party only gains when the other party loses.

What sets position-based bargaining apart from interest-based negotiation?

Positional negotiating involves both sides criticising one other's proposals in an effort to convince the other that theirs is the best. By engaging in interest-based negotiation, both (or all) sides approach the problem and search for a solution that best advances their individual interests.

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Draw a Lewis structure that obeys the octet rule for each of the following molecules and ions. In each case the first atom listed is the central atom.
a. POCl3, SO42−, XeO4, PO43−, ClO4−
b. NF3, SO32−, PO33−, ClO3−
c. ClO2−, SCl2, PCl2−

Answers

To draw a Lewis structure that obeys the octet rule for each of the molecules and ions listed, simply follow the steps outlined above and make sure that each atom has a formal charge of zero or close to zero.

For each of the molecules and ions listed, you can draw a Lewis structure that obeys the octet rule by following these steps:

1. Identify the central atom: The first atom listed in each molecule or ion is the central atom.

2. Count the number of valence electrons: Each atom has a certain number of valence electrons based on its position in the periodic table.

3. Form single bonds: Make single bonds between the central atom and each of the other atoms to use up the available valence electrons.

4. Add lone pairs: If the central atom still has electrons remaining, add lone pairs to satisfy the octet rule.

5. Check the formal charges: Make sure all atoms have formal charges of zero or close to zero.

Let's look at each molecule and ion individually:

a. POCl3, SO42−, XeO4, PO43−, ClO4−:

POCl3: The central atom is phosphorus (P) and it has 5 valence electrons. We form single bonds between the P atom and each of the other atoms, giving P a total of 8 electrons. The formal charge of each atom is zero.

SO42−: The central atom is sulfur (S) and it has 6 valence electrons. We form single bonds between the S atom and each of the other atoms, giving S a total of 8 electrons. The formal charge of each atom is zero.

XeO4: The central atom is xenon (Xe) and it has 8 valence electrons. We form single bonds between the Xe atom and each of the other atoms, giving Xe a total of 8 electrons. The formal charge of each atom is zero.

PO43−: The central atom is phosphorus (P) and it has 5 valence electrons. We form single bonds between the P atom and each of the other atoms, giving P a total of 8 electrons. The formal charge of each atom is zero.

ClO4−: The central atom is chlorine (Cl) and it has 7 valence electrons. We form single bonds between the Cl atom and each of the other atoms, giving Cl a total of 8 electrons. The formal charge of each atom is zero.

b. NF3, SO32−, PO33−, ClO3−:

NF3: The central atom is nitrogen (N) and it has 5 valence electrons. We form single bonds between the N atom and each of the other atoms, giving N a total of 8 electrons. The formal charge of each atom is zero.

SO32−: The central atom is sulfur (S) and it has 6 valence electrons. We form single bonds between the S atom and each of the other atoms, giving S a total of 8 electrons. The formal charge of each atom is zero.

PO33−: The central atom is phosphorus (P) and it has 5 valence electrons. We form single bonds between the P atom and each of the other atoms, giving P a total of 8 electrons. The formal charge of each atom is zero.

ClO3−: The central atom is chlorine (Cl) and it has 7 valence electrons. We form single bonds between the Cl atom and each of the other atoms, giving Cl a total of 8 electrons. The formal charge of each atom is zero.

c. ClO2−, SCl2, PCl2−:

ClO2−: The central atom is chlorine (Cl) and it has 7 valence electrons. We form single bonds between the Cl atom and each of the other atoms, giving Cl a total of 8 electrons. The formal charge of each atom is zero.

SCl2: The central atom is sulfur (S) and it has 6 valence electrons. We form single bonds between the S atom and each of the other atoms, giving S a total of 8 electrons. The formal charge of each atom is zero.

PCl2−: The central atom is phosphorus (P) and it has 5 valence electrons. We form single bonds between the P atom and each of the other atoms, giving P a total of 8 electrons. The formal charge of each atom is zero.

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We know that Paz is trying to produce ammonia (NH3) from thin air. From looking at the experimental set-up, what are the reactants? a) NO2 and H20 b) N2 and H2 c) NO2 and H2 d) N2 and H20

Answers

To produce ammonia (NH₃) from thin air, the reactants required are N₂ and H₂. So the correct option is b).

Give a brief account on production of ammonia.

Ammonia is one of the most abundantly produced inorganic chemicals. In 2016, there are a number of large ammonia plants around the world that produced a total of 144 million tons of nitrogen (equivalent to 175 million tons of ammonia). That number will rise to 235 million tonnes of ammonia in 2021. China produced 31.9% of its global production, followed by Russia at 8.7%, India at 7.5% and the United States at 7.1%. More than 80% of the ammonia produced is used as fertilizer for agricultural crops.

Today, most ammonia is produced on a large scale using the Haber process, with capacities of up to 3,300 tons per day. Gases N₂ and H₂ are reacted at a pressure of 200 bar. A typical modern ammonia production plant first converts natural gas, LPG, or petroleum gas into gaseous hydrogen. The process of producing hydrogen from hydrocarbons is known as steam reforming. Hydrogen then combines with nitrogen to produce ammonia by the Haber-Bosch process.

One way to produce green ammonia is to use hydrogen from the electrolysis of water and nitrogen separated from air. These are fed into the Haber Process (aka Haber-Bosch), all of which produce sustainable power.

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based on solubility rules, could you use fe(no3)3 rather than agno3 to determine the percent chloride in the unkown

Answers

No. According to solubility rule, we cannot use the Fe(NO3)3 rather than AgNO3 via analysis of precipitate of AgCl because no precipitate of cl- ion formed in Fe(NO3)3 .

A solubility chart having solubility rules is defined as a chart describing for different combinations of cations and anions whether the ionic compounds formed dissolve in or precipitate from a solution. This chart shows the solubility of various common ionic compounds in water, at a pressure of 1 atm. and under room temperature.

The following reactions are involved to determine Cl- concentration,

Case 1:  Fe(NO3)3 (aq.) + Cl-(aq.)   ----> FeCl3(aq.) + NO3-(aq.).

In this reaction involving aqueous solution of Fe(NO3)3 no precipitate of Cl- ion compound is formed .so this we can not use Fe(NO3)3 to determine %Cl- ion in solution.

Case 2 :

AgNO3(aq.) + Cl- (aq.)  ---> AgCl(precipitate) + NO3-.

This reaction involving aqueous solution of AgNO3 can be use to determine %Cl- ion concentration in solution via analysis of precipitate of AgCl .

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1. Choose the atom with the larger first ionization energy.

Select one:

a. Titanium
b. Manganese


2. Choose the atom with the larger first ionization energy.

Select one:

a. Silicon
b. Tin

Answers

The atom with the larger first ionization energy is Titanium. Option a.

The atom with the larger first ionization energy is Tin. Option b.

Ionization and ionization energy

Ionization is the process of removing one or more electrons from an atom or molecule, resulting in the formation of an ion. This can be achieved through a variety of methods, such as exposure to high-energy radiation or contact with other charged particles.

Ionization energy is the amount of energy required to remove an electron from a neutral atom or molecule, resulting in the formation of a positively charged ion. This energy is typically measured in electron volts (eV) or kilojoules per mole (kJ/mol), and varies depending on the identity of the atom or molecule and the electronic configuration of its valence shell. Ionization energy is an important property of atoms and molecules, as it can provide insight into their reactivity and chemical behavior.

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a) The ionization constant for water (Kw) is 5.476 x 10-14 at 50 oC. Calculate [H3O+], [OH-], pH, and
pOH for pure water at 60oC.
b) Look at the following table with temperature, Kw, and pH values for pure water.
Temp. (oC)
Kw
pH
0
0.114 x 10-14
7.47
10
0.293 x 10-14
7.27
20
0.681 x 10-14
7.08
25
1.008 x 10-14
7.00
40
2.916 x 10-14
6.77
60
9.550 x 10-14
6.51
100
51.3 x 10-14
6.14
Notice that the pH falls as the temperature increases.
i) Does this mean that pure water becomes more acidic as the temperature rises? _______
ii) The reason for my answer is in pure water…(choose the correct letter from 1 - 5)._______
1. the pH becomes less than 7 as the temperature rises.
2. there are less H3O+ ions created as the temperature increases.
3. there are more H3O+ ions created as the temperature increases.
4. there are always the same # of hydronium and hydroxide ions even if the pH changes.
5. the OH- ions are evaporated as the temperature rises.

Answers

A) To solve this problem, we can use the formula for the ionization constant of water:

Kw = [H3O+][OH-]

At 50 oC, Kw = 5.476 x 10-14. We can assume that [H3O+] and [OH-] are equal since we are dealing with pure water.

Therefore,

[H3O+] = [OH-] = sqrt(Kw) = sqrt(5.476 x 10-14) = 7.40 x 10-8 mol/L

pH = -log[H3O+] = -log(7.40 x 10-8) = 7.13

pOH = -log[OH-] = -log(7.40 x 10-8) = 7.13

To find the values for pure water at 60oC, we can use the new value of Kw at that temperature:

Kw = 9.550 x 10-14

[H3O+] = [OH-] = sqrt(Kw) = sqrt(9.550 x 10-14) = 3.09 x 10-7 mol/L

pH = -log[H3O+] = -log(3.09 x 10-7) = 6.51

pOH = -log[OH-] = -log(3.09 x 10-7) = 6.51

b) i) No, it does not mean that pure water becomes more acidic as the temperature rises.

ii) The correct answer is 2. As the temperature increases, the ionization of water increases and more H3O+ and OH- ions are formed. However, since the concentration of H2O is also decreasing due to the increase in temperature, the increase in ionization does not result in an increase in [H3O+] and pH actually decreases.

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