Question 1

When temperature-volume measurements are made on 1.0 mol of gas at 1.0 atm,a plot V versus T results in a

Accepted Answer

A) hyperbola. 
B) parabola. 
C) sine curve. 
D) straight line. 
A) hyperbola. 
B) parabola. 
C) sine curve. 
D) straight line. D

Question 2

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 CO2,and cylinder C contains O3.According to the kinetic molecular theory,which gas has the highest pressure?

Accepted Answer

A) HCN 
B) CO2 
C) O3 
D) All have identical pressures 
A) HCN 
B) CO2 
C) O3 
D) All have identical pressures D

Question 3

Given three cylinders containing O2 gas at the same volume and pressure.Cylinder A is at -25°C,cylinder B is at -20°F,and cylinder C is at 250 K.Which cylinder contains the largest mass of oxygen?

Accepted Answer

A) cylinder A 
B) cylinder B 
C) cylinder C 
D) All cylinders contain the same mass of O2. 
A) cylinder A 
B) cylinder B 
C) cylinder C 
D) All cylinders contain the same mass of O2. A

Question 4

At STP how many grams of Mg are required to produce 245 mL of H2 in the reaction shown below? Mg(s)+ 2 HCl(aq)→ H2(g)+ MgCl2(aq)

Accepted Answer

A) 245 g 
B) 0.266 g 
C) 0.245 g 
D) 29 g 
A) 245 g 
B) 0.266 g 
C) 0.245 g 
D) 29 g

Question 5

How many molecules of N2 are in a 250.0 mL container at 780 mm Hg and 135°C?

Accepted Answer

A) 4.38 × 1021 molecules 
B) 4.62 × 1021 molecules 
C) 1.32 × 1022 molecules 
D) 1.39 × 1022 molecules 
A) 4.38 × 1021 molecules 
B) 4.62 × 1021 molecules 
C) 1.32 × 1022 molecules 
D) 1.39 × 1022 molecules

Question 6

Which is the smallest quantity of pressure?

Accepted Answer

A) 1 atm 
B) 1 centimeter of Hg 
C) 1 mm Hg 
D) 1 pascal 
A) 1 atm 
B) 1 centimeter of Hg 
C) 1 mm Hg 
D) 1 pascal

Question 7

Carbon dioxide is a gas which causes environmental concern because of the greenhouse effect.What is the approximate percentage (by volume)of CO2 in the atmosphere?

Accepted Answer

A) 0.040% 
B) about 3% 
C) about 8% 
D) more than 15% 
A) 0.040% 
B) about 3% 
C) about 8% 
D) more than 15%

Question 8

According to the kinetic molecular theory of gases,raising the temperature of a gases increases the average kinetic energy and the frequency of ________.

Accepted Answer

The answer of According to the kinetic molecular theory of...

Question 9

A 10.0-L flask containing He,1.00 mole of Ar,and 3.00 mole of Ne has a total pressure of 24.5 atm at 25°C.How many moles of He are in the flask?

Accepted Answer

A) 6.00 mol 
B) 10.0 mol 
C) 10 .0 mol 
D) 119 mol 
A) 6.00 mol 
B) 10.0 mol 
C) 10 .0 mol 
D) 119 mol

Question 10

Which of the noble gases should show the greatest deviation from the ideal gas law at high pressures?

Accepted Answer

A) He 
B) Ar 
C) Rn 
D) All deviate equally. 
A) He 
B) Ar 
C) Rn 
D) All deviate equally.

Question 11

A balloon filled with helium gas at 20°C occupies 3.91 L at 1.00 atm.The balloon is immersed in liquid nitrogen at -196°C,raising the pressure to 5.20 atm.What is the volume of the balloon in the liquid nitrogen?

Accepted Answer

A) 0.20 L 
B) 2.6 L 
C) 5.3 L 
D) 77 L 
A) 0.20 L 
B) 2.6 L 
C) 5.3 L 
D) 77 L

Question 12

According to the kinetic molecular theory,the pressure of a gas in a container will decrease if the

Accepted Answer

A) number of collisions with the container wall increases. 
B) number of moles of the gas increases. 
C) temperature of the gas decreases. 
D) volume of the container decreases. 
A) number of collisions with the container wall increases. 
B) number of moles of the gas increases. 
C) temperature of the gas decreases. 
D) volume of the container decreases.

Question 13

A 0.700 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 13.8 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.

Accepted Answer

A) 8.93% 
B) 17.9% 
C) 35.9% 
D) 38.4% 
A) 8.93% 
B) 17.9% 
C) 35.9% 
D) 38.4%

Question 14

"Equal volumes of different gases at the same temperature and pressure contain the same molar amounts" is another way of stating

Accepted Answer

A) Avogadro's law. 
B) Boyle's law. 
C) Charles' law. 
D) Graham's law. 
A) Avogadro's law. 
B) Boyle's law. 
C) Charles' law. 
D) Graham's law.

Question 15

What is the volume of 10.0 g of oxygen gas at 157°C and 2.50 kPa pressure?

Accepted Answer

A) 51.5 L 
B) 163 L 
C) 1.61 L 
D) 447 L 
A) 51.5 L 
B) 163 L 
C) 1.61 L 
D) 447 L

Question 16

Automobile tires are typically inflated to about 30 pounds of pressure per square inch.What is the typical air pressure of a tire in kPa?

Accepted Answer

A) 2.0 × 10-3 kPa 
B) 2.0 kPa 
C) 2.1 × 102 kPa 
D) 2.1 × 105 kPa 
A) 2.0 × 10-3 kPa 
B) 2.0 kPa 
C) 2.1 × 102 kPa 
D) 2.1 × 105 kPa

Question 17

The volume of 350.mL of gas at 25°C is decreased to 125 mL at constant pressure.What is the final temperature of the gas?

Accepted Answer

A) -167°C 
B) 8.9°C 
C) 70°C 
D) 561°C 
A) -167°C 
B) 8.9°C 
C) 70°C 
D) 561°C

Question 18

The action of some commercial drain cleaners is based on the following reaction: 2 NaOH(s)+ 2 Al(s)+ 6 H2O(l)→ 2 NaAl(OH)4(s)+ 3 H2(g)
What is the volume of H2 gas formed at STP when 8.64 g of Al reacts with excess NaOH?

Accepted Answer

A) 4.78 L 
B) 7.18 L 
C) 10.8 L 
D) 11.7 L 
A) 4.78 L 
B) 7.18 L 
C) 10.8 L 
D) 11.7 L

Question 19

Which one of the following is not used to describe the condition of a gas?

Accepted Answer

A) number of moles 
B) electronic configuration 
C) temperature 
D) pressure 
A) number of moles 
B) electronic configuration 
C) temperature 
D) pressure

Question 20

A steel bottle contains argon gas at STP.What is the final pressure if the temperature is changed to 85°C?

Accepted Answer

A) 0.666 atm 
B) 0.762 atm 
C) 0.850 atm 
D) 1.31 atm 
A) 0.666 atm 
B) 0.762 atm 
C) 0.850 atm 
D) 1.31 atm

Exam 10: Gases: Their Properties and Behavior

When temperature-volume measurements are made on 1.0 mol of gas at 1.0 atm,a plot V versus T results in a

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 CO2,and cylinder C contains O3.According to the kinetic molecular theory,which gas has the highest pressure?

Given three cylinders containing O2 gas at the same volume and pressure.Cylinder A is at -25°C,cylinder B is at -20°F,and cylinder C is at 250 K.Which cylinder contains the largest mass of oxygen?

At STP how many grams of Mg are required to produce 245 mL of H2 in the reaction shown below? Mg(s)+ 2 HCl(aq)→ H2(g)+ MgCl2(aq)

How many molecules of N2 are in a 250.0 mL container at 780 mm Hg and 135°C?

Which is the smallest quantity of pressure?

Carbon dioxide is a gas which causes environmental concern because of the greenhouse effect.What is the approximate percentage (by volume)of CO2 in the atmosphere?

According to the kinetic molecular theory of gases,raising the temperature of a gases increases the average kinetic energy and the frequency of ________.

A 10.0-L flask containing He,1.00 mole of Ar,and 3.00 mole of Ne has a total pressure of 24.5 atm at 25°C.How many moles of He are in the flask?

Which of the noble gases should show the greatest deviation from the ideal gas law at high pressures?

A balloon filled with helium gas at 20°C occupies 3.91 L at 1.00 atm.The balloon is immersed in liquid nitrogen at -196°C,raising the pressure to 5.20 atm.What is the volume of the balloon in the liquid nitrogen?

According to the kinetic molecular theory,the pressure of a gas in a container will decrease if the

"Equal volumes of different gases at the same temperature and pressure contain the same molar amounts" is another way of stating

What is the volume of 10.0 g of oxygen gas at 157°C and 2.50 kPa pressure?

Automobile tires are typically inflated to about 30 pounds of pressure per square inch.What is the typical air pressure of a tire in kPa?

The volume of 350.mL of gas at 25°C is decreased to 125 mL at constant pressure.What is the final temperature of the gas?

The action of some commercial drain cleaners is based on the following reaction: 2 NaOH(s)+ 2 Al(s)+ 6 H2O(l)→ 2 NaAl(OH)4(s)+ 3 H2(g) What is the volume of H2 gas formed at STP when 8.64 g of Al reacts with excess NaOH?

Which one of the following is not used to describe the condition of a gas?

A steel bottle contains argon gas at STP.What is the final pressure if the temperature is changed to 85°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

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 CO₂,and cylinder C contains O₃.According to the kinetic molecular theory,which gas has the highest pressure?

Given three cylinders containing O₂ gas at the same volume and pressure.Cylinder A is at -25°C,cylinder B is at -20°F,and cylinder C is at 250 K.Which cylinder contains the largest mass of oxygen?

At STP how many grams of Mg are required to produce 245 mL of H₂ in the reaction shown below? Mg(s)+ 2 HCl(aq)→ H₂(g)+ MgCl₂(aq)

How many molecules of N₂ are in a 250.0 mL container at 780 mm Hg and 135°C?

Carbon dioxide is a gas which causes environmental concern because of the greenhouse effect.What is the approximate percentage (by volume)of CO₂ in the atmosphere?

The action of some commercial drain cleaners is based on the following reaction: 2 NaOH(s)+ 2 Al(s)+ 6 H₂O(l)→ 2 NaAl(OH)₄(s)+ 3 H₂(g) What is the volume of H₂ gas formed at STP when 8.64 g of Al reacts with excess NaOH?