Which gas, Cl2 (g) or COCl2(g) , will deviate most from the ideal gas law at low temperature?



Justify your choice

A fewer number of particles of gas at T1 are likely to participate in the reaction than the gas at T2.

A gas's molecular energies are distributed in accordance with temperature according to the Maxwell-Boltzmann distribution, and the most likely energy rises with increasing temperature.

The peak of the energy distribution changes to higher energies as a gas's temperature rises, and an increase in the proportion of molecules with higher energies follows. The likelihood of high-energy gas molecule collisions, which may result in chemical reactions or other types of energy transfer.

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At STP, typically defined as a temperature of 0°C (273.15K) and a pressure of 1 atm, the volume of a gas is equal to 30 L.

When the temperature of the gas is increased, the kinetic energy of the gas particles increases, causing them to move more quickly and expand. This expansion of the gas increases its volume.

Using the ideal gas law, the new volume of the gas can be calculated by multiplying the original volume by the ratio of the new temperature (323.15K) to the original temperature (273.15K) and raising that to the power of 1/273.15.

In this case, the new volume of the gas is 33.53 L. In conclusion, when the temperature of a gas is raised, its volume increases.

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The volume of 53.5 g of O₂ at 30.1°C and 110.0 kPa is 1 m³ approximately

According to Charles' Law, while pressure is maintained constant, the volume of a given amount of gas varies in direct proportion to the absolute temperature of the gas. The Kelvin scale is used to measure temperature to determine the absolute temperature.

To find the volume of a gas, we can use the Ideal Gas Law:

PV = nRT

where P is the pressure of the gas, V is the volume of the gas, n is the number of moles of gas, R is the universal gas constant, and T is the temperature of the gas in Kelvin.

First, we need to convert the given temperature of 30.1°C to Kelvin:

T = 30.1°C + 273.15 = 303.25 K

Next, we need to determine the number of moles of O₂ present. We can use the molar mass of O₂ to convert from grams to moles:

molar mass of O₂ = 32.00 g/mol

moles of O₂ = 53.5 g / 32.00 g/mol = 1.671875 mol

Now we can rearrange the Ideal Gas Law to solve for V:

V = nRT / P

V = 1.671875 × 8.3145 × 303.25 /110 k × 1000 Pa / kPa

V = 0.062878 m³

Finally, we round the answer to the nearest tenth: (rounded to one decimal place) V = 1 m³

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Answer:

A chemical formula tells us the number of atoms of each element in a compound.

Explanation:

Explanation:

formula shows

The statements that correctly describe the strength of an acid or base are:

An acid is a chemical that donates hydrogen ions, whose addition to an existing solution results in increased acidity.

According to the conventional definition of acids, they are compounds which discharge positively charged hydrogen ions when mixed with water. Acids have a sour flavor and possess pH levels below 7.

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A. The volume (in L) is 12.80 L

B. The mole is 0.035 mole

C. The temperature is 407.57 °C

D. The pressure is 126.98 atm

The volume can be obtained as follow:

PV = nRT

5.44 × V = 2 × 0.0821 × 424

Divide both sides by 5.44

V = (2 × 0.0821 × 424) / 5.44

Volume (V) = 12.80 L

The number of mole can be obtained as follow:

PV = nRT

0.250 × 1.80 = n × 0.0821 × 155

Divide both sides by (0.0821 × 155)

n = (0.250 × 1.80) / (0.0821 × 155)

Number of mole (n) = 0.035 mole

The temperature can be obtained as follow:

PV = nRT

4.47 × 26 = 2.08 × 0.0821 × T

Divide both sides by (2.08 × 0.0821)

T = (4.47 × 26) / (2.08 × 0.0821)

T = 680.57 K

Subtract 273 to obtain answer in °C

T = 680.57 - 273 K

Temperature (T) = 407.57 °C

The pressure can be obtained as follow:

PV = nRT

P × 2.25 = 10 × 0.0821 × 348

Divide both sides by 2.25

P = (10 × 0.0821 × 348) / 2.25

Pressure (P) = 126.98 atm

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The equilibrium concentration of Ag⁺ in the solution is 0.00200 M.

To solve this problem, we can use the equation for the reaction between silver nitrate (AgNO₃) and sodium iodate (NaIO₃), which is:

AgNO₃ + NaIO₃ -> AgIO₃ + NaNO₃

We know the initial concentrations of the two solutions: 0.00200 M for the AgNO₃ and 0.01 M for the NaIO₃. When they are mixed together, they will react to form a new equilibrium concentration of silver ions (Ag⁺).

To find the equilibrium concentration of Ag⁺, we need to use the stoichiometry of the reaction and the equilibrium constant (K) for the reaction. The balanced equation tells us that one mole of AgNO₃ reacts with one mole of NaIO₃ to form one mole of AgIO₃. Therefore, at equilibrium, the concentration of Ag⁺ will be equal to the initial concentration of AgNO₃ minus the amount that reacted to form AgIO₃:

[Ag⁺] = [AgNO₃] - [AgIO₃]

We can use the equilibrium constant expression for the reaction to find the concentration of AgIO₃:

K = [AgIO₃]/([AgNO₃][NaIO₃])

At equilibrium, this expression will equal the equilibrium constant for the reaction, which is given as 1.8 x 10^-12. We can rearrange this expression to solve for [AgIO₃]:

[AgIO₃] = K[AgNO₃][NaIO₃]

Substituting the initial concentrations and the value of K, we get:

[AgIO₃] = (1.8 x 10^-12)(0.00200 M)(0.01 M) = 3.6 x 10^-17 M

Now we can plug this value into the equation for [Ag⁺] to find the equilibrium concentration of silver ions:

[Ag⁺] = [AgNO₃] - [AgIO₃] = 0.00200 M - 3.6 x 10^-17 M = 0.00200 M (to three significant figures)

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The mechanism for the E1 elimination reaction of 2-methylcyclohexanol with phosphoric acid is Protonation of the alcohol group by phosphoric acid.

Protonation is the process of adding a proton (hydrogen ion) to a molecule or atom. The process is also known as hydrogenation or hydrideation. It occurs when a molecule or atom gains a proton, which imparts a positive charge on the molecule or atom.

The mechanism for the E1 elimination reaction of 2-methylcyclohexanol with phosphoric acid is as follows:

Step 1: Protonation of the alcohol group by phosphoric acid.

Phosphoric acid (H₃PO₄) donates a proton to the OH group of 2-methylcyclohexanol, forming an oxonium ion (H₃O⁺). Electron flow is shown in the following diagram:

[tex]O-H + H_3PO4 \rightarrow H_3O^+ + PO_4^3-[/tex]

Step 2: Deprotonation by a base.

The oxonium ion (H3O+) is then deprotonated by a base (e.g. a strong base such as NaOH). Electron flow is shown in the following diagram:

[tex]H_3O^+ + B^- \rightarrow H_2O + BH^+[/tex]

Step 3: Rearrangement of the molecule.

The deprotonated molecule rearranges to form a more stable carbocation intermediate. Electron flow is shown in the following diagram:

[tex]BH^+ \rightarrow B^+ + H^-[/tex]

Step 4: Nucleophilic attack by the alcohol group.

The carbocation intermediate is attacked by the OH group of 2-methylcyclohexanol, forming a new carbon-oxygen bond. Electron flow is shown in the following diagram:

[tex]C^+ + OH- \rightarrow C-O + H^+[/tex]

Step 5: Loss of a proton.

The molecule then loses a proton, forming the product of the reaction. Electron flow is shown in the following diagram:

[tex]C-O + H^+ \rightarrow C=O + H_2O[/tex]

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Tectonic events can impact the flow of radiant energy in various ways. One of the primary ways is through the formation of mountains and the alteration of landforms.

When tectonic plates collide and push against each other, they can form mountains, which can affect the flow of radiant energy. Mountains can block or redirect the flow of wind, which in turn can affect the amount of solar radiation that reaches the earth's surface.

They can also create changes in atmospheric pressure and temperature that impact the movement of air masses, which can affect the flow of radiant energy.

Tectonic events can also impact the flow of radiant energy by altering the composition of the atmosphere.

For example, volcanic eruptions can release large amounts of sulfur dioxide and other particles into the atmosphere, which can reflect and scatter incoming solar radiation, leading to cooling of the earth's surface.

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The equilibrium constant, K, for the reaction H2(g) + I2(g) ⇄ 2HI(g) can be calculated using the expression K= [HI]2/([H2][I2]). Since the concentrations of H2, I2, and HI are given in the question, we can calculate the equilibrium constant, K, for the reaction.

K = [HI]2/([H2][I2]) = (1.77 × 10-2)2/((1.83 × 10-3)(3.13 × 10-3)) = 4.43 × 104. Therefore, the equilibrium constant, K, for the reaction H2(g) + I2(g) ⇄ 2HI(g) at 425°C is 4.43 × 104.

Using the specified concentrations of H2, I2, and HI, it appears that you have correctly calculated the equilibrium constant, K, for the reaction H2(g) + I2(g) 2HI(g) at 425°C. The ratio of the concentrations of the reactants and products at equilibrium, K, is represented by each concentration being raised to the power of its stoichiometric coefficient.

The concentration of the product, HI, is preferred above the concentrations of the reactants, H2 and I2, at equilibrium, as shown by the value of K = 4.43 104 in this instance. This suggests that at equilibrium, the forward reaction—the creation of HI—is preferred.

It is significant to remember that the equilibrium constant, K, is temperature-dependent, and that temperature changes affect K's value.

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We employ molar mass, Avogadro's number, and mole-to-atom ratios to determine the number of formula units and ions present in 16.0g of NaOH.

Let's calculate by using the above implications :

The molar mass of NaOH can be calculated by adding the atomic masses of sodium (Na), oxygen (O), and hydrogen (H):

Na: 22.99 g/mol

O: 16.00 g/mol

H: 1.01 g/mol

[tex]\text{Molar mass of NaOH} = \text{Atomic mass of Na} + \text{Atomic mass of O} + \text{Atomic mass of H} = 22.99 \, \text{g/mol} + 16.00 \, \text{g/mol} + 1.01 \, \text{g/mol} = 40.00 \, \text{g/mol}[/tex]

Next, we can calculate the number of moles of NaOH in 16.0g using the formula:

moles = mass / molar mass

moles of NaOH = 16.0g / 40.00 g/mol = 0.4 mol

Since one mole of NaOH contains one formula unit of NaOH, the number of formula units can be directly taken as the number of moles. Therefore, there are 0.4 formula units of NaOH present in 16.0g of NaOH.

To determine the number of sodium ions (Na⁺) and hydroxide ions (OH⁻) present, we need to consider the formula of NaOH. It consists of one sodium ion (Na⁺) and one hydroxide ion (OH⁻).

Thus, in 16.0g of NaOH, there are:

0.4 moles of Na⁺ ions

0.4 moles of OH⁻ ions

The number of sodium ions (Na⁺) can be calculated using Avogadro's number, which states that one mole of any substance contains 6.022 × 10²³ entities (atoms, ions, or molecules).

Number of Na⁺ ions = moles of Na⁺ ions * Avogadro's number

Number of Na⁺ ions = 0.4 mol * 6.022 × 10²³ entities/mol

Similarly, the number of hydroxide ions (OH⁻) can be calculated in the same way.

Number of OH⁻ ions = moles of OH⁻ ions * Avogadro's number

Number of OH⁻ ions = 0.4 mol * 6.022 × 10²³ entities/mol

Please note that the exact numerical calculation for the number of ions would require the specific value of Avogadro's number to be inserted. However, the general method outlined here can be used to determine the number of ions present in a given mass of NaOH.

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We need a volume of 60.4 ml of 11.7 M HCl to make a 500.0 ml solution with a pH of 3.20.

To calculate the required volume of 11.7 M HCl to make a 500.0 ml solution with a pH of 3.20, we need to use the Henderson-Hasselbalch equation, which relates the pH of a solution to its pKa and the ratio of the concentrations of the conjugate base and acid.

Using the Henderson-Hasselbalch equation:

pH = pKa + log([A⁻] ÷ [HA])

where [A-] / [HA] is the ratio of the concentration of the conjugate base (Cl⁻) to the concentration of the acid (H⁺).

Rearranging the equation, we can solve for [H⁺]:

[H⁺] = [tex]10^{(pH - pKa)}[/tex]

[H⁺] = [tex]10^{(3.20 - (-1))}[/tex]

= [tex]10^{-3.20} + mol/L[/tex]

Since the concentration of HCl is equal to the concentration of [H⁺] in solution, we can calculate the moles of HCl required to make the solution:

moles of HCl = concentration of HCl × volume of solution

moles of HCl = [tex](10^{-3.20})[/tex] × (0.5 L)

= 7.08 × 10⁻⁴ mol

Finally, we can calculate the required volume of 11.7 M HCl:

volume of HCl = moles of HCl ÷ concentration of HCl

volume of HCl = (7.08 × 10⁻⁴ mol) ÷ (11.7 mol/L)

= 0.0604 L

= 60.4 ml

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Weather forecasting has substantially improved thanks to technical and data analytic advancements, but there are still a lot of intricate and dynamic aspects that can influence weather patterns, such as changes in air pressure, temperature, and humidity.

It is challenging to forecast a storm's precise trajectory and strength due to the possibility of unforeseen events and anomalies. The effects of catastrophic weather occurrences can be mitigated and forecasting accuracy can be increased with the help of ongoing technical and scientific developments.

In addition to forecasting technologies, infrastructure should be resilient to the effects of powerful storms and early warning systems that can alert people to approaching danger from severe weather should be available.

Not all countries have the financial means to support the development and application of these technologies. It is morally right for developed countries to help less developed ones obtain this technology.

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According to Henry's Law, the solubility of a gas in a liquid is directly proportional to the partial pressure of the gas above the liquid.

This means that as the pressure of the gas above the liquid increases, the solubility of the gas in the liquid will also increase. Conversely, if the pressure of the gas above the liquid decreases, the solubility of the gas in the liquid will decrease.

For example, if a bottle of carbonated water is opened and the pressure above the liquid is reduced, some of the dissolved carbon dioxide gas will come out of solution and form bubbles. This is because the solubility of carbon dioxide in water decreases as the pressure above the liquid decreases.

In general, increasing pressure favors dissolution of gas in liquid while decreasing pressure favors escape of gas from solution.

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A bullet recoiling after it is fired

The chemical formula for cassiterite is SnO2, which means that there are two moles of oxygen for every one mole of tin in the compound.

Given that there are 3.316 moles of tin in the sample, we can use the mole ratio to determine the number of moles of oxygen:

1 mole Sn : 2 moles O

3.316 moles Sn : x moles O

x = (3.316 moles Sn) x (2 moles O / 1 mole Sn) = 6.632 moles O

Therefore, there are 6.632 moles of oxygen in the sample of cassiterite.

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A neutral atom of the element with 15 electrons is phosphorus with a ground state electron configuration of 1s2 2s2 2p6 3s2 3p3. It is classified as a nonmetal element in group 15. The atoms of this element are diamagnetic, as all electrons are paired up in their orbitals.

A neutral atom is an atom that has an equal number of protons and electrons. In the case of this certain element with 15 electrons, its ground state electron configuration would be 1s2 2s2 2p6 3s2 3p3.

This means that the first shell (n=1) has 2 electrons, the second shell (n=2) has 8 electrons, and the third shell (n=3) has 5 electrons.

Based on its position in the periodic table and the number of valence electrons it has, the element with this electron configuration is phosphorus. Phosphorus is a nonmetal element that belongs to group 15, also known as the nitrogen group.

To determine whether the atoms of this element are diamagnetic or paramagnetic, we need to look at its electron configuration. In this case, we can see that all the electrons are paired up in their respective orbitals, meaning there are no unpaired electrons.

This makes the element diamagnetic, which means it does not have a magnetic field of its own and will not be attracted to a magnetic field.

In summary, a neutral atom of the element with 15 electrons is phosphorus with a ground state electron configuration of 1s2 2s2 2p6 3s2 3p3. It is classified as a nonmetal element in group 15. The atoms of this element are diamagnetic, as all electrons are paired up in their orbitals.

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The product of the reaction between methyl propanoate and CH3MgBr, followed by H3O+ is an alcohol, specifically, 2-methyl-2-propanol.

Methyl propanoate is an ester compound made up of three carbon atoms and eight hydrogen atoms. It is a colorless liquid with a slightly sweet odor. Methyl propanoate is produced through the reaction of an alcohol and an acid. The acid used is propionic acid and the alcohol is methanol. The reaction is a condensation reaction, meaning two molecules combine to form one larger molecule with a water molecule as a by-product. Methyl propanoate is used as a solvent and a flavoring agent in foods and beverages.

This is derived from the acyl portion of the methyl propanoate, which is a carboxylic acid. The reaction proceeds via a nucleophilic acyl substitution mechanism, where the CH3MgBr acts as a nucleophile, displacing the OH group from the carboxylic acid, forming a carboxylate ion. This is then protonated by the H3O+, forming the desired alcohol product. The product is represented in the following structure:

O

|

CH3-C-OH  =>  CH3-C-O-MgBr  =>  CH3-C-OH + H3O+

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We need 0.4 L of the 0.5 M MgSO₄ stock solution to make 2.0 L of 0.20 M MgSO₄.

To calculate the volume of the 0.5 M MgSO₄ stock solution needed to make 2.0 L of 0.20 M MgSO₄, we will use the formula m₁v₁ = m₂v₂.

1. Identify the given values:
m₁ = 0.5 M (concentration of the stock solution)
m₂ = 0.20 M (concentration of the desired solution)
v₂= 2.0 L (volume of the desired solution)

2. Plug the given values into the formula:
(0.5 M)(v₁) = (0.20 M)(2.0 L)

3. Solve for v1 (volume of the stock solution needed):
v₁= (0.20 M)(2.0 L) / (0.5 M)
v₁= 0.4 L

So, you need 0.4 L of the 0.5 M MgSO₄ stock solution to make 2.0 L of 0.20 M MgSO₄.

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The volume of the balloon after the addition of the extra gas is 101.8 L.

The volume of the balloon after the addition of the extra gas can be calculated using the combined gas law, which relates the initial and final conditions of pressure, volume, and temperature of a gas. We need to convert the number of moles of argon to its corresponding volume using the ideal gas law, PV = nRT, where P is the pressure, V is the volume, n is the number of moles, R is the ideal gas constant, and T is the temperature in Kelvin.

For the initial conditions, we have:

P1V1 = n1RT1

(assume the temperature is constant)

V1 = n1RT1/P1

V1 = (2.51 mol)(0.08206 L atm mol⁻¹ K⁻¹)(273 K)/(1 atm)

V1 = 55.0 L

For the final conditions, we have:

P2V2 = n2RT2

(assume the temperature is constant and the pressure is 1 atm)

V2 = n2RT2/P2

V2 = (2.51 mol + 3.13 mol)(0.08206 L atm mol⁻¹ K⁻¹)(273 K)/(1 atm)

V2 = 101.8 L

As a result, the capacity of the balloon after adding the extra gas is 101.8 L.

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The molarity of the given solutions are as follows:

Molarity refers to the concentration of a substance in solution, expressed as the number moles of solute per litre of solution.

Molarity can be calculated by dividing the number of moles in the substance by its volume.

The mass of four solutions were given in this question. The number of moles in this substances can be calculated as follows:

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There are many pioneer species that can help break down and establish new ecosystems, but two common ones are lichens and mosses. These simple organisms are often the first to colonize barren or disturbed areas, paving the way for other, more complex species to follow.

Lichens are unique in that they are actually a symbiotic combination of two different organisms – a fungus and an algae or cyanobacterium. This partnership allows them to survive in a wide range of environments, including those with little or no soil. Lichens secrete acids that can dissolve rocks and other substrates, creating a thin layer of soil that other plants can use to establish themselves. Additionally, lichens can fix nitrogen from the air, providing a crucial nutrient for plant growth.

Mosses are another common pioneer species that can help break down and prepare new environments for other plants. Like lichens, they can grow in harsh conditions with little soil or nutrients. Mosses are able to absorb moisture and nutrients directly from the air, and can also trap sediment and organic matter, building up a layer of soil over time.

Additionally, mosses can store large amounts of water, which can be important for establishing other plants during dry periods.In summary, lichens and mosses are two pioneer species that can help break down and prepare new ecosystems for other plants. Through their unique adaptations and abilities, these simple organisms play a crucial role in establishing life in harsh or barren environments.

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There is the transfer of one electron from sodium to fluorine atoms.

Ionic bonding is a type of chemical bond that occurs between atoms that have a large difference in their electronegativity, which is the ability of an atom to attract electrons towards itself in a chemical bond.

In ionic bonding, one atom transfers one or more valence electrons to another atom, forming two oppositely charged ions. The atom that loses electrons becomes a positively charged ion, called a cation, while the atom that gains electrons becomes a negatively charged ion, called an anion.

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To calculate the equilibrium concentrations, we first need to determine the initial concentrations of each gas.

The initial concentration of CO is 0.400 mol/5.00 L = 0.0800 M, Br2 is 0.300 mol/5.00 L = 0.0600 M, and COBr2 is 0.0200 mol/5.00 L = 0.00400 M.

The balanced equation for the reaction is:

CO(g) + Br2(g) ⇌ COBr2(g)

Let's assume that at equilibrium, the concentrations of COBr2 is x M. Therefore, the concentrations of CO and Br2 will be (0.0800 - x) M and (0.0600 - x) M, respectively.

The equilibrium constant expression (Kc) for this reaction is:

Kc = [COBr2] / ([CO] * [Br2])

Substituting the equilibrium concentrations into the Kc expression, we have:

Kc = (x) / ((0.0800 - x) * (0.0600 - x))

Solving for x using the given values and the equation above, we find x ≈ 0.0040 M.

Therefore, the equilibrium concentrations for the gases are:

[CO] ≈ 0.0760 M

[Br2] ≈ 0.0560 M

[COBr2] ≈ 0.0040 M

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If we add 45.0 g of sodium chloride to 500.0 g of water,  the melting point is -  5.7 °C and the boiling point of the solution is 101.5 °C.

The mass of the NaCl = 45 g

The mass of the water = 500 g

The moles of the NaCl = mass / molar mass

                                      = 45 / 58.44

                                      = 0.770 mol

The molality is expressed as :

b = moles of solute / mass of solvent in kg

b = 0.770 / 0.5

b = 1.54 m

The boiling-point elevation  :

ΔTb = 2 × 0.512 × 1.54

       = 1.5 ° C

The boiling point, Tb = 100°C + 1.5 °C

                                   = 101.5 °C

The expression is as :

ΔTf = 2 × 1.86 × 1.54

     = 5.7 °C

The melting point = 0 - 5.7

                              = - 5.7 °C

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The mole fraction of xenon in the gas mixture is 0.631.

Mole fraction refers to the ratio of the number of moles of one component of a mixture to the total number of moles in the mixture. It is a useful concept in chemistry and thermodynamics, particularly in the study of gas mixtures.

In this problem, we are given a gas mixture of xenon (Xe) and argon (Ar) with a total pressure of 12.20 atm. We are also given the partial pressure of argon, which is 4.50 atm. To find the mole fraction of xenon, we need to first find the partial pressure of xenon.

To do this, we can use the fact that the total pressure of the gas mixture is equal to the sum of the partial pressures of each component:

Total pressure = Partial pressure of Xe + Partial pressure of Ar

12.20 atm = Partial pressure of Xe + 4.50 atm

Partial pressure of Xe = 7.70 atm

Now that we have the partial pressure of xenon, we can use the mole fraction formula:

Mole fraction of Xe = Number of moles of Xe / Total number of moles

We can rewrite this formula as:

Mole fraction of Xe = Partial pressure of Xe / Total pressure

Using the values we found earlier:

Mole fraction of Xe = 7.70 atm / 12.20 atm

Mole fraction of Xe = 0.631

Therefore, the mole fraction of xenon in the gas mixture is 0.631.

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This attraction is known as hydrogen bonding, which occurs when a hydrogen atom that is covalently bonded to one electronegative atom (such as oxygen) is attracted to another electronegative atom in another molecule. In the case of water molecules, the hydrogen atoms have a partial positive charge and the oxygen atoms have a partial negative charge due to differences in electronegativity. This allows for the formation of hydrogen bonds between adjacent water molecules. The hydrogen bonding gives water its unique properties such as high boiling point and surface tension.

Mg₃N₂ will be completely consumed, and there will be some H₂O left over after the reaction is complete.

To determine the limiting reactant, we need to compare the number of moles of each reactant present to the stoichiometric ratio in the balanced equation.

From the balanced equation, we see that for every 1 mole of Mg₃N₂, 6 moles of H₂O are required. Therefore, the stoichiometric ratio of Mg₃N₂ to H₂O is 1:6.

To find out which reactant is limiting, we can calculate the amount of products that each reactant could produce.

For Mg₃N₂:
0.600 mol Mg₃N₂ x (3 mol Mg(OH)₂ / 1 mol Mg₃N₂) = 1.80 mol Mg(OH)₂

For H₂O:
4.00 mol H₂O x (3 mol Mg(OH)₂ / 6 mol H₂O) = 2.00 mol Mg(OH)₂

Since Mg₃N₂ can only produce 1.80 mol Mg(OH)₂, which is less than the amount that H₂O can produce (2.00 mol), Mg₃N₂ is the limiting reactant.

Therefore, Mg₃N₂ will be completely consumed, and there will be some H₂O left over after the reaction is complete.

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Answer:

106.5 J, and it was lost.

Explanation:

To calculate the amount of heat transferred, we can use the following formula:

Q = m * c * ΔT

where Q is the amount of heat transferred, m is the mass of the substance, c is the specific heat capacity of the substance, and ΔT is the change in temperature.

For graphite, the specific heat capacity is approximately 0.71 J/g°C.

So we have:

Q = 15.0 g * 0.71 J/g°C * (-10°C)

Q = -106.5 J

The negative sign of the answer indicates that the graphite lost heat, since its temperature decreased. Therefore, the heat was transferred from the graphite to its surroundings.

So the amount of heat transferred from the graphite was 106.5 J, and it was lost.