A lungful of air (500 mL)contains 4.1% CO2 by volume.How many grams of KO2(s)is needed to remove the CO2 from a lungful of air at STP according to the following reaction? 4 KO2(s)+ 2 CO2(g)→ 2 K2CO3(s)+ 3 O2(g)

A) 0.065 g B) 0.13 g C) 0.26 g D) 1.2 g A) 0.065 g B) 0.13 g C) 0.26 g D) 1.2 g

A 0.500 g sample containing Ag2O and inert material is heated,causing the silver oxide to decompose according to the following equation: 2 Ag2O(s)→ 4 Ag(s)+ O2(g) If 6.90 mL of gas are collected over water at 27°C and 1.00 atm external pressure,what is the percentage of silver oxide in the sample? The partial pressure of water is 26.7 mm Hg at 27°C.

A) 6.25% B) 12.5% C) 25.0% D) 26.0% A) 6.25% B) 12.5% C) 25.0% D) 26.0%

Each of three identical 15.0-L gas cylinders contains 7.50 mol of gas at 295 K.Cylinder A contains HCN,cylinder B contains NO2,and cylinder C contains O3.According to the kinetic molecular theory,which gas has the highest average kinetic energy?

A) HCN B) NO2 C) O3 D) All have identical average kinetic energies A) HCN B) NO2 C) O3 D) All have identical average kinetic energies

How many grams of H2 gas are there in a 5.00-L cylinder at 4.00 × 103 mm Hg and 23°C?

A) 1.08 g B) 2.16 g C) 0.542 g D) 823 g A) 1.08 g B) 2.16 g C) 0.542 g D) 823 g

Exam 10: Gases: Their Properties and Behavior

A lungful of air (500 mL)contains 4.1% CO₂ by volume.How many grams of KO₂(s)is needed to remove the CO₂ from a lungful of air at STP according to the following reaction? 4 KO₂(s)+ 2 CO₂(g)→ 2 K₂CO₃(s)+ 3 O₂(g)

(Multiple Choice)

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Question 81

How many grams of XeF₆ are required to react with 1.16 L of hydrogen gas at 2.46 atm and 45°C in the reaction shown below? XeF₆(s)+ 3 H₂(g)→ Xe(g)+ 6 HF(g)

(Multiple Choice)

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Question 82

A 0.500 g sample containing Ag₂O and inert material is heated,causing the silver oxide to decompose according to the following equation: 2 Ag₂O(s)→ 4 Ag(s)+ O₂(g) If 6.90 mL of gas are collected over water at 27°C and 1.00 atm external pressure,what is the percentage of silver oxide in the sample? The partial pressure of water is 26.7 mm Hg at 27°C.

(Multiple Choice)

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Question 83

Which of the following gases has the highest average speed at 400K?

(Multiple Choice)

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Question 84

Which of the following would have a density of 3.04 g/L at 7.0°C and 0.987 atm?

(Multiple Choice)

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Question 85

If one mole of gas occupies 22.4 L at STP the same gas would occupy ________ than 22.4 L at 60°C and 630 mm Hg.

(Short Answer)

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Question 86

For an ideal gas,which pairs of variables are inversely proportional to each other (if all other factors remain constant)? I.P,T II.P,V III.V,T IV.n,T

(Multiple Choice)

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Question 87

Each of three identical 15.0-L gas cylinders contains 7.50 mol of gas at 295 K.Cylinder A contains HCN,cylinder B contains NO₂,and cylinder C contains O₃.According to the kinetic molecular theory,which gas has the highest average kinetic energy?

(Multiple Choice)

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Question 88

-What is the pressure (in mm Hg)of the gas inside the above apparatus if the outside pressure,P_atm,is 745 mm Hg and the difference in mercury levels,Δh,is 25 mm Hg?

(Multiple Choice)

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Question 89

A steel bottle contains argon gas at STP.What is the final pressure if the temperature is changed to 125°C?

(Multiple Choice)

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Question 90

How many grams of XeF₆ are required to react with 0.579 L of hydrogen gas at 2.46 atm and 45°C in the reaction shown below? XeF₆(s)+ 3 H₂(g)→ Xe(g)+ 6 HF(g)

(Multiple Choice)

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Question 91

Effusion of a 1:1 mixture of two gases,represented by unshaded and shaded spheres in the diagram below,through a small pinhole produces the result shown below.The shaded spheres have a molecular mass of 20 amu.Which gas molecules have the higher average speed and what is the molecular mass of the unshaded molecules?

(Multiple Choice)

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Question 92

In the diagram below,nitrogen molecules are represented by unshaded spheres,oxygen molecules by gray spheres,and chlorine molecules by black spheres. -If the total pressure in the container is 800.mm Hg,what is the partial pressure of oxygen?

(Multiple Choice)

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Question 93

-What is the pressure (in mm Hg)of the gas inside the above apparatus if the outside pressure,P_atm,is 750 mm Hg and the difference in mercury levels,Δh,is 50 mm Hg?

(Multiple Choice)

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Question 94

Which of the following would have a density of 1.89 g/L at 7.0°C and 0.987 atm?

(Multiple Choice)

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Question 95

A 1.75 L container filled with CO₂ gas at 25°C and 225 kPa pressure springs a leak.When the container is re-sealed,the pressure is 200 kPA and the temperature is 10°C.How many moles of gas were lost?

(Multiple Choice)

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Question 96

An "empty" aerosol can at 25°C still contains gas at 1.00 atmosphere pressure.If an "empty" can is thrown into a 450°C fire,what is the final pressure in the heated can?

(Multiple Choice)

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Question 97

The ozone molecules in the stratosphere absorb much of the ultraviolet radiation from the sun,protecting life on Earth.At a certain altitude,the temperature of the stratosphere is 240 K and the partial pressure of ozone is 1.4 × 10^-7 atm.Calculate the number of ozone molecules present in 1.00 L of atmosphere at that altitude.

(Multiple Choice)

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Question 98

How many grams of H₂ gas are there in a 5.00-L cylinder at 4.00 × 10³ mm Hg and 23°C?

(Multiple Choice)

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Question 99

Which of the following gases has the lowest average speed at 25°C?

(Multiple Choice)

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Question 100

Showing 81 - 100 of 188

A lungful of air (500 mL)contains 4.1% CO₂ by volume.How many grams of KO₂(s)is needed to remove the CO₂ from a lungful of air at STP according to the following reaction? 4 KO₂(s)+ 2 CO₂(g)→ 2 K₂CO₃(s)+ 3 O₂(g)

How many grams of XeF₆ are required to react with 1.16 L of hydrogen gas at 2.46 atm and 45°C in the reaction shown below? XeF₆(s)+ 3 H₂(g)→ Xe(g)+ 6 HF(g)

Which of the following gases has the highest average speed at 400K?

Which of the following would have a density of 3.04 g/L at 7.0°C and 0.987 atm?

If one mole of gas occupies 22.4 L at STP the same gas would occupy ________ than 22.4 L at 60°C and 630 mm Hg.

For an ideal gas,which pairs of variables are inversely proportional to each other (if all other factors remain constant)? I.P,T II.P,V III.V,T IV.n,T

Each of three identical 15.0-L gas cylinders contains 7.50 mol of gas at 295 K.Cylinder A contains HCN,cylinder B contains NO₂,and cylinder C contains O₃.According to the kinetic molecular theory,which gas has the highest average kinetic energy?

-What is the pressure (in mm Hg)of the gas inside the above apparatus if the outside pressure,P_atm,is 745 mm Hg and the difference in mercury levels,Δh,is 25 mm Hg?

A steel bottle contains argon gas at STP.What is the final pressure if the temperature is changed to 125°C?

How many grams of XeF₆ are required to react with 0.579 L of hydrogen gas at 2.46 atm and 45°C in the reaction shown below? XeF₆(s)+ 3 H₂(g)→ Xe(g)+ 6 HF(g)

In the diagram below,nitrogen molecules are represented by unshaded spheres,oxygen molecules by gray spheres,and chlorine molecules by black spheres. -If the total pressure in the container is 800.mm Hg,what is the partial pressure of oxygen?

-What is the pressure (in mm Hg)of the gas inside the above apparatus if the outside pressure,P_atm,is 750 mm Hg and the difference in mercury levels,Δh,is 50 mm Hg?

Which of the following would have a density of 1.89 g/L at 7.0°C and 0.987 atm?

A 1.75 L container filled with CO₂ gas at 25°C and 225 kPa pressure springs a leak.When the container is re-sealed,the pressure is 200 kPA and the temperature is 10°C.How many moles of gas were lost?

An "empty" aerosol can at 25°C still contains gas at 1.00 atmosphere pressure.If an "empty" can is thrown into a 450°C fire,what is the final pressure in the heated can?

How many grams of H₂ gas are there in a 5.00-L cylinder at 4.00 × 10³ mm Hg and 23°C?

Which of the following gases has the lowest average speed at 25°C?

Chemical Tools: Experimentation and Measurement

Atoms, molecules, and Ions

Mass Relationships in Chemical Reactions

Reactions in Aqueous Solutions

Periodicity and the Electronic Structure of Atoms

Ionic Compounds: Periodic Trends and Bonding

Covalent Bonding and Electron-Dot Structures

Covalent Compounds: Bonding Theories and Molecular Structure

Thermochemistry: Chemical Energy

Liquids, solids, and Phase Changes

Solutions and Their Properties

Chemical Kinetics

Chemical Equilibrium

Aqueous Equilibria: Acids and Bases

Applications of Aqueous Equilibria

Thermodynamics: Entropy, free Energy, and Equilibrium

Electrochemistry

Nuclear Chemistry

Transition Elements and Coordination Chemistry

Metals and Solid-State Materials

The Main-Group Elements

Connections to Organic and Biological Chemistry

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Exam 10: Gases: Their Properties and Behavior

A lungful of air (500 mL)contains 4.1% CO2 by volume.How many grams of KO2(s)is needed to remove the CO2 from a lungful of air at STP according to the following reaction? 4 KO2(s)+ 2 CO2(g)→ 2 K2CO3(s)+ 3 O2(g)

How many grams of XeF6 are required to react with 1.16 L of hydrogen gas at 2.46 atm and 45°C in the reaction shown below? XeF6(s)+ 3 H2(g)→ Xe(g)+ 6 HF(g)

Which of the following gases has the highest average speed at 400K?

Which of the following would have a density of 3.04 g/L at 7.0°C and 0.987 atm?

If one mole of gas occupies 22.4 L at STP the same gas would occupy ________ than 22.4 L at 60°C and 630 mm Hg.

For an ideal gas,which pairs of variables are inversely proportional to each other (if all other factors remain constant)? I.P,T II.P,V III.V,T IV.n,T

Each of three identical 15.0-L gas cylinders contains 7.50 mol of gas at 295 K.Cylinder A contains HCN,cylinder B contains NO2,and cylinder C contains O3.According to the kinetic molecular theory,which gas has the highest average kinetic energy?

-What is the pressure (in mm Hg)of the gas inside the above apparatus if the outside pressure,Patm,is 745 mm Hg and the difference in mercury levels,Δh,is 25 mm Hg?

A steel bottle contains argon gas at STP.What is the final pressure if the temperature is changed to 125°C?

How many grams of XeF6 are required to react with 0.579 L of hydrogen gas at 2.46 atm and 45°C in the reaction shown below? XeF6(s)+ 3 H2(g)→ Xe(g)+ 6 HF(g)

In the diagram below,nitrogen molecules are represented by unshaded spheres,oxygen molecules by gray spheres,and chlorine molecules by black spheres. -If the total pressure in the container is 800.mm Hg,what is the partial pressure of oxygen?

-What is the pressure (in mm Hg)of the gas inside the above apparatus if the outside pressure,Patm,is 750 mm Hg and the difference in mercury levels,Δh,is 50 mm Hg?

Which of the following would have a density of 1.89 g/L at 7.0°C and 0.987 atm?

A 1.75 L container filled with CO2 gas at 25°C and 225 kPa pressure springs a leak.When the container is re-sealed,the pressure is 200 kPA and the temperature is 10°C.How many moles of gas were lost?

An "empty" aerosol can at 25°C still contains gas at 1.00 atmosphere pressure.If an "empty" can is thrown into a 450°C fire,what is the final pressure in the heated can?

How many grams of H2 gas are there in a 5.00-L cylinder at 4.00 × 103 mm Hg and 23°C?

Which of the following gases has the lowest average speed at 25°C?

Chemical Tools: Experimentation and Measurement

Atoms, molecules, and Ions

Mass Relationships in Chemical Reactions

Reactions in Aqueous Solutions

Periodicity and the Electronic Structure of Atoms

Ionic Compounds: Periodic Trends and Bonding

Covalent Bonding and Electron-Dot Structures

Covalent Compounds: Bonding Theories and Molecular Structure

Thermochemistry: Chemical Energy

Liquids, solids, and Phase Changes

Solutions and Their Properties

Chemical Kinetics

Chemical Equilibrium

Aqueous Equilibria: Acids and Bases

Applications of Aqueous Equilibria

Thermodynamics: Entropy, free Energy, and Equilibrium

Electrochemistry

Nuclear Chemistry

Transition Elements and Coordination Chemistry

Metals and Solid-State Materials

The Main-Group Elements

Connections to Organic and Biological Chemistry

Filters

A lungful of air (500 mL)contains 4.1% CO₂ by volume.How many grams of KO₂(s)is needed to remove the CO₂ from a lungful of air at STP according to the following reaction? 4 KO₂(s)+ 2 CO₂(g)→ 2 K₂CO₃(s)+ 3 O₂(g)

How many grams of XeF₆ are required to react with 1.16 L of hydrogen gas at 2.46 atm and 45°C in the reaction shown below? XeF₆(s)+ 3 H₂(g)→ Xe(g)+ 6 HF(g)

Each of three identical 15.0-L gas cylinders contains 7.50 mol of gas at 295 K.Cylinder A contains HCN,cylinder B contains NO₂,and cylinder C contains O₃.According to the kinetic molecular theory,which gas has the highest average kinetic energy?

-What is the pressure (in mm Hg)of the gas inside the above apparatus if the outside pressure,P_atm,is 745 mm Hg and the difference in mercury levels,Δh,is 25 mm Hg?

How many grams of XeF₆ are required to react with 0.579 L of hydrogen gas at 2.46 atm and 45°C in the reaction shown below? XeF₆(s)+ 3 H₂(g)→ Xe(g)+ 6 HF(g)

-What is the pressure (in mm Hg)of the gas inside the above apparatus if the outside pressure,P_atm,is 750 mm Hg and the difference in mercury levels,Δh,is 50 mm Hg?

A 1.75 L container filled with CO₂ gas at 25°C and 225 kPa pressure springs a leak.When the container is re-sealed,the pressure is 200 kPA and the temperature is 10°C.How many moles of gas were lost?

How many grams of H₂ gas are there in a 5.00-L cylinder at 4.00 × 10³ mm Hg and 23°C?