How many liters of ammonia, measured at STP, are produced when 28.0 grams of nitrogen is completely consumed?
N2(g) + 3 H2(g) → 2 NH3(g)

A.
11.2

B.
44.8

C.
22.4

D.
5.60

The velocity of an  object is the ratio of the distance to the time. The distance travelled by Kangaroo is 396 m in 12 seconds. So its velocity is 33 m/s.

Velocity is a physical quantity and it is the measure of distance travelled per unit time. Velocity is the rate of speed and it  is a vector quantity.The velocity can be expressed in terms of m/s, Km/hr etc.

Mathematically, velocity is the ratio of distance to the time.

Given that, distance covered by kangaroo is 396 meters.

time taken = 12 s.

therefore, velocity can be calculated as follows:

velocity = distance/time

             = 396 m / 12 s

             = 33 m/s.

Therefore, the velocity of the kangaroo is 33 m/s.

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Two isomeric monobromination products should result from the allylic bromination of methylene cyclohexane, according to expectations. The final product will be 1-(bromomethyl)cyclohexene.

N-Bromosuccinimide, also known as NBS, is a chemical reagent utilized mostly in organic chemistry's electrophilic addition, electrophilic substitution, and radical substitution processes. It is regarded as an easy way to get bromine radicals. NBS interacts with the substance in an aqueous solution in alkenes to produce bromohydrins as the end result.

Allylic bromination is defined as the reaction employing NBS that results in the substitution of a bromine atom for hydrogens on a carbon next to a double bond.

Following  drawing of the methylene cyclohexane extended structure, the reaction will be carried out using the reagent NBS.

The IUPAC name of the product is 1-(bromomethyl)cyclohexene.

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When the dry ingredients of a cake are combined, the result is a mixture. Option 3.

In chemistry, mixtures are substances that are obtained by mixing two or more chemically different substances together with each substance maintaining its chemical identity. In other words, the components of a mixture are still chemically unique and can be separated by physical means.

Mixtures can be homogeneous or heterogeneous. Homogenous mixtures are mixtures in which the components are uniformly dispersed throughout the entire mixture. For heterogeneous mixtures, the components are not uniform throughout the mixture.

Thus, when the dry ingredients of a cake, such as flour, sugar, etc., are combined, what we are going to have is a mixture. Whether this mixture would be homogenous or heterogeneous will depend on the level of mixing. Whatever the case may be, the components can still be separated by physical means.

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The formula unit of a salt that is not correct is [tex]Ca_{2} O[/tex] in option C.

A salt is almost always made up of a metal and a nonmetal element. The salts as we know them are mostly ionic in nature and they are known to be able to dissolve in solution when they are put into solution.

We know that the salt that they meant to show in option C is calcium oxide and the foregoing can not be the correct formula since both the calcium and the oxygen ions are divalent. The correct formula of the salt would be CaO.

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Because ddNTPs are only intended to be added occasionally to ensure that strands of all lengths are produced, dNTPs are used at the highest concentrations in sequencing reactions.

The DNA sequencing response consists of four major ingredients: "Template" Genetic material copied by E. coli; free bases, this same four types of DNA building blocks; short dna called "primers"; and Enzyme dna, the enzyme which copies DNA. The reaction is began by heating the two dna strands till the they separate. The template then anneals/binds towards its intended location, and DNA polymerase begins elongating it. If expected to complete, a fresh dna strand would be formed. A nucleoside triphosphate contains a trna molecule bound to a 5-carbon sugar with phosphate groups bound to the sugar. They are the single - molecule forerunner of both DNA and RNA, that are chains of nucleotides formed during the DNA replication process.

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The speed of sound in given substances from slowest to fastest: 25°C air, 50°C air, water, steel.

Sound can transmit through liquids, gases, solids, and plasma as longitudinal waves, these are also known as compression waves. Sound waves need a medium to travel so they can be propagated through solids as longitudinal and transverse waves.

Longitudinal sound waves exhibit alternating pressure deviations leading to compression and rarefaction, while transverse waves exhibit alternating shear stress perpendicular to the propagation path.

Waves can cause matter to move up and down but can not carry along with them. As the temperature of the air increases the molecules start to vibrate faster eventually the speed of the sound increase.

The speed of sound is lowest in gases, faster in water, and fastest in steel (solid).

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Answer:

Explanation:

When Luke stirs the water, the particles from bottom to top and vice-versa, and hence the heat is transferred to all the water molecules.

The mode of transfer of heat here is convection.

When he stirs water then the water molecules from the top ( away from the flame ) travel to the bottom ( towards the flame ) and hence water gets heated uniformly leading to a good observation.

Due to uniform heating of water which leads to good observations.

I doiont know tbh

Explanation:

A radioactive atom emits a cluster of neutrons and protons-235  heavier than an alpha particle in a process known as cluster decay.

Cluster decay, also known as heavy particle radioactivity or heavy ion radioactivity, is a very uncommon form of nuclear decay in which an atomic nucleus generates a small "cluster" of neutrons and protons, more than in an alpha particle but less than a typical binary fission fragment. The cluster size is also produced by ternary fission into three fragments. When the parent nucleus loses protons, it becomes the daughter nucleus, which has an atomic number Zd = Z + Ze and a mass number Ad = A Ae, where Ae = Ne + Ze. [1] For instance

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The formula for PPM  =100 /1,000,000=0.01 PPM = 100 / 1 , 000 , 000 = 0.01 . i.e concentrations of arsenic should be less than 0.01 *1000 therefore it should be less than 10 ml for 1000ml of water.

This stands for "parts per million" and can alternatively be written as mg/L (milligrams per liter). The mass of a chemical or contamination per volume of water is the unit of measurement here. On a lab report, ppm or mg/L both signify the same thing. It provides information about a substance's density when it is dissolved in water. Examples include total alkalinity, calcium hardness, and free chlorine. A substance has a PPM of 1 if it makes up one millionth of the entire amount of water.

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The Jim passes a 1.5 kg basketball of 60 N. The acceleration is 40 m/s². Therefore, option A is correct.

Acceleration is the rate at which an object's velocity with respect to time changes. They are vector quantities, accelerations. The direction of the net force acting on an object determines the direction of its acceleration.

Acceleration is the rate at which the speed and direction of a moving object vary over time. A point or object going straight ahead is accelerated when it accelerates or decelerates. Even if the speed is constant, motion on a circle accelerates because the direction is always shifting.

A = F / m

= 60 / 1.5

= 40 m/s²

Thus, option A is correct.

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The solubility of a gas is directly proportional to the pressure and proportional to the temperature.

As we increase the pressure of a gas its collision frequency increases hence solubility increases as we decreases the pressure the solubility decreases. Collision frequency is defined as the collision of atoms on increasing pressure atoms start moving from one place to another. The relationship pressure is linear with solubility. It is defined by Henry's law.

The effect of temperature depends on the nature of solute and solvent.

Basically, as we increase the temperature in gas phase solubility also increases.

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1.62 moles of air the toy now contain. At STP, moles can be converted to gas volume and gas volume to moles using molar volume.

An experimental gas law known as Avogadro's law or Avogadro-hypothesis Ampère's connects the volume of a gas to the amount of gas material present. The law is an instance of the ideal gas theory.

At constant temperature and pressure, volume is directly proportional to the number of moles of the gas.

The formula used for solving this type of problems is:

v1 / v2 = n1/ n2

let's plug in the given values in the formula:

5.17 / 8.00 = 1.05 m / n2

n2 = 8.00 * 1.05  /  5.17

n2 = 1.62 moles

So, the toy contains 1.62 moles of air when it's volume is 8.00 Liter.

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If calcium makes up 3.4% by mass of Earth's crust, the grams of calcium present if a sample of Earth's crust has a mass of 1.5 g is 0.051 g.

How to calculate mass?

The mass of an element in a sample can be calculated by multiplying the percent abundance of that element by the mass of sample.

According to this question, calcium makes up 3.4% by mass of Earth's crust. If a sample of Earth's crust has a mass of 1.5 g, the mass of calcium present can be calculated as follows:

mass of calcium = 3.4/100 × 1.5 g

mass of calcium = 0.051 g

Therefore, if calcium makes up 3.4% by mass of Earth's crust, the grams of calcium present if a sample of earths crust has a mass of 1.5 g is 0.051 g.

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Answer:

the answer would be c

Explanation:

Substance is fast acting, either immediately suffocating the victim or causing massive burning is chemical weapons.

Chemicals used to intentionally kill or damage people through their poisonous qualities are known as chemical weapons. Chemical weapons also include weapons, apparatus, and other gear made expressly for turning hazardous substances into weapons.

What chemical weapon has the highest lethality?

What VX is VX is a nerve toxin that was created by humans for use in chemical warfare. The most dangerous and quickly acting of the known chemical warfare agents are nerve agents.

Basically, these weapons were just common munitions like grenades and artillery rounds that had well-known industrial chemicals added to them. Among the chemicals employed were chlorine, mustard gas, which causes terrible skin burns, and phosgene, a choking toxin.

The most critical effects are paralysis of the respiratory muscles and inhibition of the respiratory center. Ultimately, death results due to respiratory paralysis. If the concentration of the nerve agent is high, death is immediate.

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Ore veins and disseminated deposits are  differ in terms of their size, shape, and distribution.

An ore vein is a large, continuous body of mineral deposits that are typically found in fractures or voids in rock formations. Ore veins are typically formed when minerals that are dissolved in water fill a void or crack in a rock formation. Ore veins are typically quite large and can be several meters in width and several kilometers in length. They are also typically found at depths of several hundred meters or more. Ore veins are generally easier to mine because they are more concentrated and can be more easily accessed through underground mining methods.

A disseminated deposit, on the other hand, is a type of mineral deposit that is dispersed or scattered throughout a larger rock formation. Disseminated deposits are usually smaller and less concentrated than ore veins and are typically found at shallower depths. They are often harder to mine because the minerals are not as concentrated and are more dispersed throughout the rock formation

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The maximum amount of flammable liquids that can be stored outside of a rated flammable cabinet in a laboratory is 25 number of gallons.

To make certain flammable drinks are remoted from incompatible substances, they need to simplest be saved in a flammable cupboard this is used simplest for the garage of Class three Flammable Liquids. Extra care should be taken now no longer to take flammable drinks into regions of the laboratory which are the usage of incompatible substances.

The most quantity of flammable drinks that you could save in a single flammable cupboard is primarily based totally at the chemical's Flash Point and Boiling Point. No extra than 60 gallons of a Category 1, 2 or three flammable liquid or a hundred and twenty gallons of a Category four flammable liquid can be saved in a Flammable Safety Cabinet.No extra than 25 gallons of flammable drinks will be saved in a room outdoor of an permitted garage cupboard.

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Answer: Dinitrogen trioxide

Explanation:

The frequency of the light emitted by hydrogen is equal to 4.57 Hz.

The frequency of the wave can be defined as the number of oscillations of a wave per second. The frequency has S.I. units of s⁻¹ or Hertz.

The wavelength can be described as the distance between two adjacent crests on a wave.

The relation between frequency, wavelength, and speed of light (c) can be shown as:

c = νλ

Given, the wavelength of the light emitted by H-atom, ν = 6.56 × 10⁻⁷ m

The speed of light, [tex]c =3 \times 10^8\; m/s[/tex]

The frequency of the light emitted by hydrogen atoms can determine from the above-mentioned relationship:

ν= c/λ = 3 ×10⁸/6.56 × 10⁻⁷ = 4.57 Hz

Therefore, the frequency of the emitted light is equal to 4.57 Hz.

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The option that is an intensive property is brittle (option C).

Intensive property of a material is that property that does not depend on the amount or shape of the material, a property of the material at a specific point in space.

The properties of matter that do not depend on the size or quantity of matter in any way are referred to as an intensive property of matter.

Intensive properties of matter include the following: temperature, density, colour, melting and boiling point, etc., because they will not change with a change in size or quantity of matter.

Therefore, brittleness is an intensive property of a material.

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The total binding energy of 80Zr is therefore approximately 4.58MeV.

An isotope is an atom of a particular element that has a different number of neutrons than other atoms of that same element. This difference in the number of neutrons causes the isotopes to have different atomic masses. Isotopes of an element can be either stable or unstable. Stable isotopes are not radioactive and do not decay, while unstable isotopes are radioactive and undergo radioactive decay.

The total binding energy of 80Zr can be estimated using the mass defect of the two isotopes. According to the semi-empirical mass formula, the binding energy of a nucleus is related to its mass defect. The mass defect of the two nuclei can be calculated by subtracting the mass of the separate nuclei from the mass of the combined nucleus.

The mass of 40Ca is 39.96259 amu and the mass of 80Zr is 79.91652 amu. The combined mass of the two nuclei is 119.87911 amu.
The mass defect of the combined nucleus is therefore 119.87911 - 39.96259 - 79.91652 = 0.005 amu,
or 0.005 x 931.5 MeV/amu = 4.58MeV.
The total binding energy of 80Zr is therefore approximately 4.58MeV.

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Answer:

39.0

Explanation:

Answer: 8N (8 kg/ms")

Explanation: F= M*A

F= (2KG)*(4/MS") = 8N

The equation that is correct is as follows: mechanical energy = kinetic energy + potential energy (option C).

Mechanical energy is one of the forms of energy and it is the sum of the potential energy and kinetic energy of a body or system.

The potential energy is the energy possessed by an object because of its position (in a gravitational or electric field), or its condition (as a stretched or compressed spring).

On the other hand, kinetic energy is the energy possessed by an object because of its motion.

In other words, mechanical energy describes the energy of an object because of its motion or position, or both.

Therefore, option C is the correct equation.

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The chloride ions  in a mixture of 2mol of barium chloride and 1 mol of potassium chloride are 3 moles

Generally, Barium chloride is an inorganic compound with the formula BaCl2. It is a white solid that is highly soluble in water. It is commonly used as a test for detecting the presence of sulfates in a solution and as a precursor to other barium compounds. Barium chloride is toxic if ingested, so it should be handled with caution.

There are a total of 3 moles of chloride ions in the mixture of 2 moles of barium chloride and 1 mole of potassium chloride.

Barium chloride contains 2 moles of chloride ions, and potassium chloride contains 1 mole of chloride ions, for a total of 2 + 1 = 3 moles of chloride ions.

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(a) sp2- hybrid orbital of C1 and p-orbital of O1 , because, central atom i.e. carbon has sp2-hybridization and in surrounded oxygen atom last electrons enters in p-orbital. (b) 1200 bond angle, because shape is trigonal planar.

Atomic orbitals are generally specific through a mixture of numerals and letters that constitute precise residences of the electrons related to the orbitals—for example, 1s, 2p, 3d, 4f. The numerals, referred to as primary quantum numbers, imply strength degrees in addition to relative distance from the nucleus. The simple names s orbital, p orbital, d orbital, and f orbital refer to orbitals with angular momentum quantum number ℓ = 0, 1, 2, and 3 respectively.

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Chromate anion is basically situated in the chromate salt. These oxoanions also possess the property of the oxidizing agent. The presence of chromate and dichromate anions results in chemical equilibrium. It is commercially used to prevent corrosion.This is because of Le Chatelier's Principle.

According to the Le Chatelier principle, when a dynamic equilibrium system is perturbed by a change in, say, pressure, temperature, or the concentration of products or reactants, the equilibrium will shift in the opposite direction to make up for the disturbance.

To further grasp this idea, consider the following example:

in the case of an equilibrium general reaction:

A (g) + B (g) <=> C (g) + D (g) (g) ΔH < 0 (it denotes an exothermic process) (it means an exothermic reaction)

The following is an example of this reaction:

A (g) + B (g) <=> Energy is released when an exothermic reaction occurs between C and D.

If the temperature increases or heat is added, the equilibrium will shift to the left because of the principle.

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The pH change is +0.125 when 20.0 ml of 0.100 m naoh is added to 80.0 ml of a buffer solution consisting of 0.166 m nh3 and 0.186 m nh4cl.

Find the moles of NaOH and the moles of your initial acid and base, calculate the new molarities, and use the henderson-hasselbalch equation with your new concentrations. So I used the pKa of NH4Cl for the initial pH. (9.3). pH = 9.3 + log (0.169M/0.183M), and I measured 9.265, which is slightly different. Then, using M = mol/L 0.1M = x mol/0.02L, I calculated the moles of NaOH, which were 0.002. I used the same method to determine the moles of NH3 and NH4Cl, which were 0.0135 and 0.01464, respectively, after determining the moles of NaOH.When a strong base is added to a buffer, the acidic component reacts with the added base, releasing OH- ions and increasing the moles of acid and base, respectively. With this information, I added the number of moles of NaOH to the moles of NH3 0.0135 + 0.002 = 0.0155 moles and subtracted the number of moles of NaOH from the moles of NH4Cl 0.01464 - 0.002 = 0.01264 moles, then calculated the molarities by dividing the moles by (0.08 L + 0.02 L to account for the addition of NaOH), and calculated the new concentrations.[NH3] = 0.155M, [NH4Cl] = 0.1264M, now that we have the new concentrations of acid and base, substitute them into the H-H equation to get the new pH: pH = 9.3 + log (0.155/0.1264) = 9.39.9.39 - 9.265 = a pH change of +0.125.

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