Question 1

Which of the following regions of the earth's atmosphere contains the ozone layer?

Accepted Answer

A) mesosphere 
B) stratosphere 
C) thermosphere 
D) troposphere 
A) mesosphere 
B) stratosphere 
C) thermosphere 
D) troposphere

Question 2

What is the density of carbon monoxide gas at STP?

Accepted Answer

A) 0.510 g/L 
B) 0.800 g/L 
C) 1.96 g/L 
D) 1.25 g/L 
A) 0.510 g/L 
B) 0.800 g/L 
C) 1.96 g/L 
D) 1.25 g/L

Question 3

A basketball is inflated to a pressure of 2.10 atm in a 20.0°C garage.What is the pressure of the basketball outside where the temperature is -5.00°C?

Accepted Answer

A) 1.92 atm 
B) 2.29 atm 
C) 2.10 atm 
D) 2.50 atm 
A) 1.92 atm 
B) 2.29 atm 
C) 2.10 atm 
D) 2.50 atm

Question 4

In an open end manometer,one end of a U-tube filled with mercury is attached to a gas-filled container and the other end is open to the atmosphere.If the gas pressure in the container is less than atmospheric pressure

Accepted Answer

A) Hg will be forced out of the open end of the U-tube. 
B) the difference between the Hg levels in the two arms will be greater than 76 cm. 
C) the Hg level will be higher in the arm connected to the container. 
D) the Hg level will be higher in the arm open to the atmosphere. 
A) Hg will be forced out of the open end of the U-tube. 
B) the difference between the Hg levels in the two arms will be greater than 76 cm. 
C) the Hg level will be higher in the arm connected to the container. 
D) the Hg level will be higher in the arm open to the atmosphere.

Question 5

A 1.00 L flask contains nitrogen gas at 25°C and 1.00 atm pressure.What is the final pressure in the flask if an additional 0.50 g of N2 gas is added to the flask and the flask cooled to -55°C?

Accepted Answer

A) 1.01 atm 
B) 1.05 atm 
C) 0.319 atm 
D) 3.13 atm 
A) 1.01 atm 
B) 1.05 atm 
C) 0.319 atm 
D) 3.13 atm

Question 6

When pressure-volume measurements are made on 1.0 mol of gas at constant temperature,a plot V versus P 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.

Question 7

A balloon filled with helium gas at 20°C occupies 2.91 L at 1.00 atm.The balloon is immersed in liquid nitrogen at -180°C,raising the pressure to 5.20 atm.What is the volume of the balloon in the liquid nitrogen?

Accepted Answer

A) 0.178 L 
B) 5.62 L 
C) 5.04 L 
D) 0.199 L 
A) 0.178 L 
B) 5.62 L 
C) 5.04 L 
D) 0.199 L

Question 8

If the number of moles of gas is halved at constant temperature and volume,the pressure of the gas

Accepted Answer

A) is doubled. 
B) is halved. 
C) is one-fifth. 
D) remains the same. 
A) is doubled. 
B) is halved. 
C) is one-fifth. 
D) remains the same.

Question 9

If 1.0 gram each of Cl2,CO2,N2,and O2 are contained in a 5-L flask,the gas with the highest partial pressure is ________.

Accepted Answer

Question 10

What is the value of the gas constant,R,in units of   ?

Accepted Answer

A) 1.080 × 10-4 
B) 0.1080 
C) 62.36 
D) 6.236 × 104 
A) 1.080 × 10-4 
B) 0.1080 
C) 62.36 
D) 6.236 × 104

Question 11

Which of the following equations represents "Boyle's law"?

Accepted Answer

A)   
= k 
B)   
= k 
C) PV = k 
D) V = nk 
A)   
= k 
B)   
= k 
C) PV = k 
D) V = nk

Question 12

The apparatus shown is called a closed-end manometer because the arm not connected to the gas sample is closed to the atmosphere and is under vacuum.  
-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?

Accepted Answer

A) 25 mm Hg 
B) 720 mm Hg 
C) 745 mm Hg 
D) 770 mm Hg 
A) 25 mm Hg 
B) 720 mm Hg 
C) 745 mm Hg 
D) 770 mm Hg

Question 13

The mixing of different gases by random molecular motion with frequent collisions is called

Accepted Answer

A) Dalton's law. 
B) compressibility. 
C) diffusion. 
D) effusion. 
A) Dalton's law. 
B) compressibility. 
C) diffusion. 
D) effusion.

Question 14

Each of three identical 15.0-L gas cylinders contains 7.50 mol of gas at 295 K.Cylinder A contains He,cylinder B contains CO2,and cylinder C contains SO2.According to the kinetic molecular theory,which gas has the highest density?

Accepted Answer

A) He 
B) CO2 
C) SO2 
D) All have identical densities 
A) He 
B) CO2 
C) SO2 
D) All have identical densities

Question 15

A 0.529-g sample of gas occupies 125 mL at 60.cm of Hg and 25°C.What is the molar mass of the gas?

Accepted Answer

A) 11 g/mol 
B) 81 g/mol 
C) 110 g/mol 
D) 130 g/mol 
A) 11 g/mol 
B) 81 g/mol 
C) 110 g/mol 
D) 130 g/mol

Question 16

Which of the following regions of the earth's atmosphere is farthest from the surface of the earth?

Accepted Answer

A) mesosphere 
B) stratosphere 
C) thermosphere 
D) troposphere 
A) mesosphere 
B) stratosphere 
C) thermosphere 
D) troposphere

Question 17

Which of the following is the principal cause of global warming?

Accepted Answer

A) acid rain 
B) air pollution 
C) greenhouse effect 
D) ozone depletion 
A) acid rain 
B) air pollution 
C) greenhouse effect 
D) ozone depletion

Question 18

A greenhouse gas of greatest concern that is from human activities is

Accepted Answer

A) oxygen. 
B) fluorine. 
C) radon. 
D) methane. 
A) oxygen. 
B) fluorine. 
C) radon. 
D) methane.

Question 19

The lowest atmospheric temperatures are found at the

Accepted Answer

A) earths surface. 
B) troposphere/stratosphere junction. 
C) stratosphere/mesosphere junction. 
D) mesosphere/thermosphere junction. 
A) earths surface. 
B) troposphere/stratosphere junction. 
C) stratosphere/mesosphere junction. 
D) mesosphere/thermosphere junction.

Question 20

A gas bottle contains 0.450 mol of gas at 730 mm Hg pressure.If the final pressure is 1.15 atm,how many moles of gas were added to the bottle?

Accepted Answer

A) 0.0471 mol 
B) 0.0888 mol 
C) 0.497 mol 
D) 0.539 mol 
A) 0.0471 mol 
B) 0.0888 mol 
C) 0.497 mol 
D) 0.539 mol

Exam 10: Gases: Their Properties and Behavior

Which of the following regions of the earth's atmosphere contains the ozone layer?

What is the density of carbon monoxide gas at STP?

A basketball is inflated to a pressure of 2.10 atm in a 20.0°C garage.What is the pressure of the basketball outside where the temperature is -5.00°C?

In an open end manometer,one end of a U-tube filled with mercury is attached to a gas-filled container and the other end is open to the atmosphere.If the gas pressure in the container is less than atmospheric pressure

A 1.00 L flask contains nitrogen gas at 25°C and 1.00 atm pressure.What is the final pressure in the flask if an additional 0.50 g of N2 gas is added to the flask and the flask cooled to -55°C?

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

A balloon filled with helium gas at 20°C occupies 2.91 L at 1.00 atm.The balloon is immersed in liquid nitrogen at -180°C,raising the pressure to 5.20 atm.What is the volume of the balloon in the liquid nitrogen?

If the number of moles of gas is halved at constant temperature and volume,the pressure of the gas

If 1.0 gram each of Cl2,CO2,N2,and O2 are contained in a 5-L flask,the gas with the highest partial pressure is ________.

What is the value of the gas constant,R,in units of ?

Which of the following equations represents "Boyle's law"?

The mixing of different gases by random molecular motion with frequent collisions is called

Each of three identical 15.0-L gas cylinders contains 7.50 mol of gas at 295 K.Cylinder A contains He,cylinder B contains CO2,and cylinder C contains SO2.According to the kinetic molecular theory,which gas has the highest density?

A 0.529-g sample of gas occupies 125 mL at 60.cm of Hg and 25°C.What is the molar mass of the gas?

Which of the following regions of the earth's atmosphere is farthest from the surface of the earth?

Which of the following is the principal cause of global warming?

A greenhouse gas of greatest concern that is from human activities is

The lowest atmospheric temperatures are found at the

A gas bottle contains 0.450 mol of gas at 730 mm Hg pressure.If the final pressure is 1.15 atm,how many moles of gas were added to the bottle?

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 1.00 L flask contains nitrogen gas at 25°C and 1.00 atm pressure.What is the final pressure in the flask if an additional 0.50 g of N₂ gas is added to the flask and the flask cooled to -55°C?

If 1.0 gram each of Cl₂,CO₂,N₂,and O₂ are contained in a 5-L flask,the gas with the highest partial pressure is ________.

Each of three identical 15.0-L gas cylinders contains 7.50 mol of gas at 295 K.Cylinder A contains He,cylinder B contains CO₂,and cylinder C contains SO₂.According to the kinetic molecular theory,which gas has the highest density?