A 10.0-g sample of sodium metal reacts with 2.50 L of nitrogen gas at 0.976 atm and 28 °C to produce sodium nitride.
a. Write a balanced chemical equation for this reaction. Do not include phases.
b. How many grams of sodium nitride are produced in this reaction?

A. .CH3 + .CH3: Homolysis

B. H3C+ + .CI: Heterolysis

C. + Br. Br. :Br:: Homolysis

D. + Br2: Heterolysis

Homolysis is a chemical reaction where link between two atoms is broken and the two resultant fragments share an equal number of the bond's electrons.

In homolysis, one of the two electrons that were initially engaged in the bond is retained by each of the two resultant fragments, resulting in the production of two neutral entities, each of which has an unpaired electron. In a heterolytic reaction, two atoms' bonds are broken, but the electrons that made up the bond are not equally distributed among the two fragments that arise. In heterolysis, one of the atoms keeps both of its electrons and transforms into the negatively charged anion species, while the other atom transforms into the positively charged cation species.

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The research sponsored by the National Institutes of Health (NIH) on rare diseases is aimed at finding treatments and solutions for these conditions. The research outcomes are intended to benefit individuals affected by rare diseases and improve their health outcomes.

The National Institutes of Health (NIH) plays a significant role in funding and supporting research related to various medical conditions, including rare diseases. Through its sponsorship of medical foundations, the NIH provides resources and financial support to conduct research specifically focused on rare diseases. This research aims to advance the understanding of these diseases, identify potential treatments, and develop interventions that can improve the lives of individuals affected by these conditions.

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If more \(H_{2}\) and \(N_{2}\) are added to the reaction 3\(H_{2}\) + N2 → 2\(NH_{3}\) after it reaches equilibrium, two events will occur Shift in Equilibrium and Increased Yield of \(NH_{3}\)

1. Shift in Equilibrium: According to Le Chatelier's principle, when additional reactants are added, the equilibrium will shift in the forward direction to consume the added reactants and establish a new equilibrium. In this case, more \(NH_{3}\) will be produced to counteract the increase in \(H_{2}\) and \(N_{2}\).

2. Increased Yield of \(NH_{3}\): The shift in equilibrium towards the forward reaction will result in an increased yield of \(NH_{3}\). As more \(H_{2}\) and \(N_{2}\) are added, the reaction will favor the production of \(NH_{3}\) to maintain equilibrium. This will lead to an increase in the concentration of \(NH_{3}\) compared to the initial equilibrium state.

It is important to note that the equilibrium position will ultimately depend on factors such as the concentrations of \(H_{2}\), \(N_{2}\), and \(NH_{3}\), as well as the temperature and pressure of the system. By adding more reactants, the equilibrium will adjust to achieve a new balance, favoring the formation of more \(NH_{3}\).

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Ideal gas law is used to solve this. 62 L  is the volume of 2.3 mol Chlorine  gas at 290 K and 0.89 atm.

Each thing in three dimensions takes up some space. The volume of this area is what is being measured. The space filled within an object's borders in three dimensions is referred to as its volume. It is sometimes referred to as the object's capacity. Finding an object's volume can help us calculate the quantity needed to fill it, such as the volume of water required to refill a bottle, aquarium, or water tank.

PV = nRT

n = 2.3 mol, T = 290 K and P = 0.89 atm.

V = n RT/ P

V = 2.3 mol × 0.082 × 290 /0.89

V = 62 L

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The change in entropy for the melting of acetic acid in J/mol K is 39.8 J/mol K.

Acetic acid is a colorless, clear liquid that has a distinctive, pungent smell. Acetic acid is an organic acid with the chemical formula CH3COOH, abbreviated as HOAc or HAc. The acetic acid molecule is composed of two functional groups: a carboxylic acid group (-COOH) and a methyl group (-CH3). The carboxylic acid group is acidic in nature and can donate a proton to a base like water.

The heat of fusion is the amount of heat energy required to melt or freeze a substance at a constant temperature. It is represented by ΔHfus or ΔHm, and it is measured in joules per gram (J/g). When a substance undergoes a phase change from solid to liquid or liquid to solid, the heat of fusion is absorbed or released.

The measure of disorder or randomness in a system is known as entropy. It is represented by S and measured in joules per kelvin per mole (J/K/mol). In other words, it measures the amount of energy that is dispersed or dissipated in a system. When a system goes from a more ordered to a more disordered state, the entropy increases.

The change in entropy for the melting of acetic acid in J/mol K is calculated using the formula:

ΔS = ΔHfus / T where ΔS is the change in entropy, ΔHfus is the heat of fusion, and T is the temperature in Kelvin. We are given that the heat of fusion of acetic acid is 192 J/g and its melting point is 16.6°C.To convert the temperature to Kelvin, we add 273.15:16.6°C + 273.15 = 289.75 K.Substitute the values into the formula:ΔS = 192 J/g / 289.75 K = 0.663 J/g K.To find the change in entropy for 1 mole of acetic acid, we need to convert the units from J/g K to J/mol K by multiplying by the molar mass of acetic acid, which is 60.05 g/mol:ΔS = 0.663 J/g K x 60.05 g/mol = 39.8 J/mol K.Therefore, the change in entropy for the melting of acetic acid in J/mol K is 39.8 J/mol K.

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Answer:

5.27

Explanation:

Answer:

a

Explanation:

uffvyffvfvf

The Bernard would need 18.23 g of the concentrated HCl solution to make a 2.0 L 0.1 M HCl solution.

To solve the problem, we'll use the following formula and approach:

M₁V₁ = M₂V₂,

Where:

M₁ = initial molarity

V₁ = initial volume

M₂ = final molarity

V₂ = final volume

As per data:

M₁ = unknown

V₁ = unknown

M₂ = 0.1 M

V₂ = 2.0 L

To calculate the amount of concentrated HCl solution required, we'll need to first calculate the moles of HCl needed:

Moles of HCl = M₂ x V₂

                      = 0.1 x 2.0

                      = 0.2 mol

Next, we'll calculate the mass of HCl required, keeping in mind that the concentrated solution contains 40% w/w HCl:

Mass of HCl = moles of HCl x Molar mass of HCl

Mass of HCl = 0.2 mol x 36.46 g/mol

                    = 7.292 g (for 100% pure HCl)

However, the concentrated HCl solution contains only 40% w/w HCl, which means that 7.292 g of HCl is present in every 100 g of the solution.

To find the mass of solution required, we'll need to use the following equation:

Mass of solution required = Mass of HCl x (100/40)

Mass of solution required = 7.292 g x (100/40)

                                           = 18.23 g

Therefore, to create a 2.0 L solution containing 0.1 M of HCl, Bernard would require 18.23 g of the concentrated HCl solution.

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Answer: The staircase is 14.28 m high.

Explanation:

Given : Mass = 0.1 kg

Potential energy = 14 J

Potential energy is the energy occupied by the position of a substance. Therefore, formula for potential energy is as follows.

P.E = mgh

where,

m = mass

g = gravitational energy = \(9.8 m/s^{2}\)

h = height of object

Substitute the values into above formula as follows.

\(P.E = m \times g \times h\\14 J = 0.1 kg \times 9.8 m/s^{2} \times h\\h = \frac{14 J}{0.1 kg \times 9.8 m/s^{2}}\\= \frac{14 J}{0.98 m kg/s^{2}}\\= 14.28 Js^{2}/ mkg (1 J s^{2}/m kg = 1 m)\\= 14.28 m\)

Thus, we can conclude that the staircase is 14.28 m high.

Answer:

na

Explanation:

gggggggggggggggggggggggggg

Cl (chlorine) ion is negatively charged.

The best description for the prediction that increasing the concentration of reactants increases the rate of a reaction is that an increase in the concentration of reactants leads to a higher reaction rate.

When the concentration of reactants is increased, there are more reactant particles available in the reaction mixture. This increases the frequency of collisions between the reactant particles, leading to a higher probability of successful collisions and therefore an increased rate of reaction.

According to the collision theory, for a reaction to occur, reactant particles must collide with sufficient energy and with the correct orientation. By increasing the concentration of reactants, the chances of effective collisions are increased, as there are more reactant particles in close proximity to each other. This results in a higher reaction rate. Therefore, the prediction states that increasing the concentration of reactants will increase the rate of the reaction.

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When diluting a strong acid with water, it is recommended to add the acid to the water and not the other way around. The statement is true.

This is because adding water to the acid can cause a rapid and exothermic reaction, leading to splattering and potential injury.

When the acid is added to the water, the heat generated is absorbed by the water, reducing the potential for splattering. Additionally, adding the acid to water allows for better mixing and reduces the risk of creating concentrated acid pockets that can be dangerous.

Overall, it is important to follow safe laboratory practices when working with acids and to consult with a trained professional if you are unsure about the proper procedures.

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2.50 litres of a 10.0 M solution require the preparation of 25.0 moles of ethylene glycol.

Excellent antifreeze, anti-boil, and anti-corrosive qualities are produced when antifreeze and water are mixed in a 50/50 ratio. The proportion of conventional ethylene glycol to water in severely cold conditions can reach 70% antifreeze, 30% water. The maximum antifreeze to water ratio when using DEX-COOL® is 60/40.

moles = concentration (M) x volume (L)

Given that the desired concentration is 10.0 M and the volume needed is 2.50 L, the setup for calculating the total number of moles of ethylene glycol can be written as:

moles = 10.0 M x 2.50 L

moles = 25.0 mol

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The 20 percent carbon monoxide level is approximately five times more effective for oxygen transport than the 60 percent carbon monoxide level.

Carbon monoxide (CO) is an odorless, colorless and tasteless gas that is toxic to humans and animals. It is produced when fossil fuels such as gasoline, wood, coal, or natural gas are burned. Carbon monoxide is a product of incomplete combustion, when there is not enough oxygen to produce carbon dioxide. In the presence of oxygen, carbon monoxide can be converted to carbon dioxide. In the environment, carbon monoxide is created by the burning of fossil fuels and by natural processes such as forest fires. In the home, carbon monoxide is produced by fuel-burning appliances, such as furnaces, stoves, water heaters, and fireplaces. Inadequate ventilation can allow carbon monoxide to accumulate to dangerous levels. Exposure to high levels of carbon monoxide can cause serious health problems, including death. Symptoms of carbon monoxide poisoning include headache, dizziness, nausea, and difficulty breathing.

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(c) is more soluble at higher because lower concentrations of shift the solubility equilibrium toward and.

The solubility of a substance refers to the amount of that substance that can dissolve in a given amount of solvent at a given temperature and pressure. In this situation, the student is placing a certain mass into different solutions with specific values, and then measures the concentration of ions in each solution after equilibrium is reached.

Based on the data in the table, it can be concluded that:

In summary, the solubility of is more at higher because lower concentrations of shift the solubility equilibrium towards and. It means as the concentration of ions decreases, the solubility of the substance increases.

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The surrounding environment should be taken into account, the relevant permissions should be obtained, and building codes, earthquake safety standards, and energy efficiency recommendations should be followed.

Simple reinforced-concrete homes can cost as much as 450,000 Yen/sqm to build, compared to a simple wood-framed home's typical cost of 200,000 Yen/sqm.

Foreigners are permitted to own homes and property for any reason, and the tax rate for land purchases is the same as that of all Japanese citizens. You can purchase either vacant land or an existing home or flat.

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The correct answer to the question is option C. Polychlorinated biphenyls (PCBs) are not sourced from household trash, but rather from industrial processes such as the production of electrical equipment and hydraulic systems.

PCBs are a group of chemicals that were commonly used in electrical equipment such as transformers, capacitors, and fluorescent light ballasts. They were banned in the United States in 1979 due to their harmful effects on human health and the environment.

Dioxins are a type of hazardous waste that can be generated during the combustion of chlorine compounds, such as those found in waste incineration and certain manufacturing processes. They can also be produced during forest fires and volcanic eruptions. Dioxins are highly toxic and can cause a range of health problems including cancer, reproductive and developmental problems, and immune system damage.

Lead is a hazardous waste that is commonly found in computer components such as cathode ray tubes, printed circuit boards, and batteries. When these components are improperly disposed of, lead can leach into the soil and water, posing a risk to human health and the environment. Lead exposure can cause neurological damage, developmental delays, and other health problems.

Mercury is a hazardous waste that is commonly found in fluorescent lights and batteries. When these products are disposed of improperly, mercury can be released into the environment and can accumulate in the food chain, posing a risk to human health and the environment. Mercury exposure can cause neurological damage, especially in children and developing fetuses.

Fly ash is a type of hazardous waste that is generated during the combustion of coal in power plants. It contains high levels of toxic substances such as heavy metals and can pose a risk to human health and the environment if not properly disposed of. Mass burn incinerators, on the other hand, are designed to burn solid waste, reducing its volume and producing energy in the process. However, they can also produce hazardous waste such as dioxins and fly ash if not properly controlled.

Polychlorinated biphenyls (PCBs) are incorrectly paired with their source as household trash. PCBs are actually sourced from industrial processes such as the production of electrical equipment and hydraulic systems.

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Answer:

it's volume also decrease

Answer: THE ANSWER IS OZONE WEEEE a layer in the earth's stratosphere at an altitude of about 6.2 miles (10 km) containing a high concentration of ozone, which absorbs most of the ultraviolet radiation reaching the earth from the sun.

Explanation:

Answer: The answer is The Ozone layer

An aqueous potassium carbonate solution is made by dissolving 6.29 moles of K₂CO₃ in sufficient water so that the final volume of the solution is 4.20L. The molarity of a solution is 1.50M.

Molarity is defined as the moles of solute present in the specific amount or volume of a solution. We calculate the moles of a substance using the formula

moles=(mass/molar mass)

If the volume of a solution is given in ml, then convert it into L.

Molarity is calculated as

Molarity=moles/volume(in L)

Given that moles=6.29, and volume=4.20L

Plug both values in the formula

Molarity=(6.29 mol/4.20 L)

Molarity=1.4976 mol/L

Molarity=1.50 M (∵M=mol/L)

Therefore, the molarity of a K₂CO₃ solution is 1.50M.

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Adding Cs2SO3, which will quickly dissolve in the solution, would increase the buffer capacity of the 1.00L aqueous solution containing Na2SO3.

Buffer capacity is a measure of the ability of a solution to resist changes in pH when an acid or base is added. It depends on the concentrations of the buffering components in the solution. In this case, the solution contains Na2SO3, which acts as a buffer.

By adding Cs2SO3, which will quickly dissolve in the solution, we are increasing the concentration of the buffering component (SO3^2-) in the solution. This increase in the concentration of the buffering component leads to an increase in the buffer capacity of the solution.

Diluting the solution with water would decrease the concentration of the buffering component, resulting in a decrease in buffer capacity. Adding KHSO3 would introduce a different buffering component, but it may or may not increase the buffer capacity depending on the specific concentrations and properties of the components. Adding excess NaOH would neutralize any H2SO3 present and disrupt the buffering system, leading to a decrease in buffer capacity.

To increase the buffer capacity of the 1.00L aqueous solution containing Na2SO3, the recommended action is to add Cs2SO3, which will quickly dissolve in the solution. This increases the concentration of the buffering component and enhances the solution's ability to resist changes in pH.

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B. 2-bromo-4-ethyl benzene carboxylic acid. The term "industrial chemical" is short form for "International Union of Pure and Applied Chemistry(iupac).

The IUPAC nomenclature is based on naming the longest continuous or ring-shaped chain of carbon atoms linked by a single bond within a given molecule. Prefixes or suffixes are used in accordance with a predetermined order to identify all deviations, including those involving multiple bonds or atoms other than carbon and hydrogen.

The base name is written first, then the name of the compound is spelt out in alphabetical order (derived from the number of carbons in the parent chain). The name has no spaces in it.

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The number of carbon atoms the sample contain is 1.23 × 10²⁴ C atoms. The total mass of the sample is 30.03 g.

To find the number of carbon atoms in the sample, we need to determine the mole ratio of H atoms to C atoms in propane (C₃H₈). C₃H₈ has 3 carbon atoms and 8 hydrogen atoms. Therefore, the mole ratio of H atoms to C atoms is 8:3.

Since we know the number of H atoms in the sample (3.28 × 10²⁴), we can use this ratio to find the number of C atoms:

8 H atoms : 3 C atoms = 3.28 × 10²⁴ H atoms : x C atoms

x C atoms = (3/8) × (3.28 × 10²⁴) = 1.23 × 10²⁴ C atoms

To determine the total mass of the sample, we need to know the mass of one mole of propane (C₃H₆). The molar mass of C₃H₈ is:

1 mol C₃H₈ = 3(12.01 g/mol) + 8(1.01 g/mol) = 44.11 g/mol

Therefore, the mass of one molecule of C₃H₈ is:

44.11 g/mol / 6.022 × 10²³ molecules/mol = 7.33 × 10⁻²³ g/molecule

To find the total mass of the sample, we multiply the number of H atoms by the molar mass of propane and divide it by the Avogadro's number and the mole ratio of H to propane.

mass = (3.28 × 10²⁴ H atoms)(1 mol H / 6.022 × 10²³ H atoms)(1 mol C₃H₈ / 8 mol H)( 44.11 g/mol C₃H₈) = 30.03 g (rounded to two decimal places)

Therefore, the sample contains 1.23 × 10²⁴ C atoms and has a total mass of 30.03 g.

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Answer:2 H2O → H3O + OH

Explanation:

Water molecules dissociate to form H+ and OH- ions, which can then recombine to form water molecules, is indicated by H₂O ⇄ H⁺ + OH⁻.

Ions are atoms or molecules with non-zero net charges. As a result, all ions either have more protons than electrons in their overall atomic or molecular structure, or they have more electrons than protons.

It is known that ions with more protons than electrons have a net positive charge. These ions are frequently referred to as cations. On the other hand, ions that have more electrons than protons are known to have a net negative charge. These ions are typically referred to as anions.

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The chemist should use 30 liters of the 20% solution, 20 liters of the 30% solution, and 40 liters of the 60% solution to obtain a mixture of 90 liters containing 40% acid.

Let's denote the number of liters of the 20% solution as x, the number of liters of the 30% solution as y, and the number of liters of the 60% solution as z.

According to the problem, we have the following information:

The total volume of the mixture is 90 liters: x + y + z = 90.

The desired percentage of acid solution in the mixture is 40%: (0.20x + 0.30y + 0.60z) / 90 = 0.40.

The chemist wants to use 2 times as much of the 60% solution as the 30% solution: z = 2y.

Now, we can solve these equations simultaneously to find the values of x, y, and z.

From equation 3, we have z = 2y.

Substituting this into equation 1, we get:

x + y + 2y = 90

x + 3y = 90 (equation 4)

From equation 2, we have:

(0.20x + 0.30y + 0.60z) / 90 = 0.40

Multiplying both sides by 90, we get:

0.20x + 0.30y + 0.60z = 36

0.20x + 0.30y + 0.60(2y) = 36 (since z = 2y)

0.20x + 0.30y + 1.20y = 36

0.20x + 1.50y = 36 (equation 5)

Now, we can solve equations 4 and 5 simultaneously to find the values of x and y.

Multiplying equation 4 by 0.20, we get:

0.20(x + 3y) = 0.20(90)

0.20x + 0.60y = 18

Subtracting this from equation 5, we eliminate x and solve for y:

0.20x + 1.50y - (0.20x + 0.60y) = 36 - 18

0.90y = 18

y = 18 / 0.90

y = 20

Substituting this value of y back into equation 4, we find:

x + 3y = 90

x + 3(20) = 90

x + 60 = 90

x = 90 - 60

x = 30

Since z = 2y, we have:

z = 2(20)

z = 40

Therefore, the chemist should use 30 liters of the 20% solution, 20 liters of the 30% solution, and 40 liters of the 60% solution to obtain a mixture of 90 liters containing 40% acid.

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Answer:

#4: 0.89 mol/L #5: 0.36 mol

Explanation:

#4: Morality is Moles/ Liters

So take 3.2 mols ÷ 3.6 L = 0.8888... since there are 2 sig figs in the question the answer would round to 0.89 mol/L

#5: to find the number of moles needed, you take the mol/L and multiply that by the volume.

0.89 mol/L ×0.400L = 0.356 mols. the liters cancel out. Since 0.89 has the least number of sig figs your final answer should have 2. which it 0.36 mols.

I hope this helps, good luck!

EDTA (ethylenediaminetetraacetic acid) is commonly used to determine the hardness of water due to its ability to form complexes with metal ions, particularly calcium and magnesium ions.

Water hardness refers to the concentration of calcium and magnesium ions present in water. These ions can cause scaling, reduce the effectiveness of soaps, and have other negative effects. EDTA acts as a chelating agent, meaning it can bind to metal ions and form stable complexes.

In the process of determining water hardness, a known amount of EDTA solution is added to a water sample. The EDTA molecules form complexes with the calcium and magnesium ions present in the water.

The endpoint of the titration is reached when all the metal ions are complexed by the EDTA, resulting in a color change or an indicator reaching a specific endpoint.

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