Question 1

If 50.75 g of a gas occupies 10.0 L at STP, 129.3 g of the gas will occupy __________ L at STP.

Accepted Answer

A) 3.92 
B) 50.8 
C) 12.9 
D) 25.5 
E) 5.08 
A) 3.92 
B) 50.8 
C) 12.9 
D) 25.5 
E) 5.08

Question 2

The kinetic-molecular theory predicts that pressure rises as the temperature of a gas increases because __________.

Accepted Answer

A) the average kinetic energy of the gas molecules decreases 
B) the gas molecules collide more frequently with the wall 
C) the gas molecules collide less frequently with the wall 
D) the gas molecules collide more energetically with the wall 
E) both the gas molecules collide more frequently with the wall and the gas molecules collide more energetically with the wall 
A) the average kinetic energy of the gas molecules decreases 
B) the gas molecules collide more frequently with the wall 
C) the gas molecules collide less frequently with the wall 
D) the gas molecules collide more energetically with the wall 
E) both the gas molecules collide more frequently with the wall and the gas molecules collide more energetically with the wall

Question 3

Of the following, only __________ is impossible for an ideal gas.

Accepted Answer

A)    
B) V1T1 = V2T2 
C)    
D)    
E)    
A)    
B) V1T1 = V2T2 
C)    
D)    
E)

Question 4

The root-mean-square speed of H2S at 26.0°C is __________ m/sec.

Accepted Answer

A) 334 
B) 62.4 
C) 468 
D) 751 
E) 214 
A) 334 
B) 62.4 
C) 468 
D) 751 
E) 214

Question 5

The van der Waals equation corrects the ideal gas law for the finite volume and __________ of gas molecules.

Accepted Answer

The answer of The van der Waals equation corrects the...

Question 6

A sample of a gas (5.0 mol)at 1.0 atm is expanded at constant temperature from 10 L to 15 L. The final pressure is __________ atm.

Accepted Answer

A) 1.5 
B) 7.5 
C) 0.67 
D) 3.3 
E) 15 
A) 1.5 
B) 7.5 
C) 0.67 
D) 3.3 
E) 15

Question 7

If one was told that their blood pressure was 130/80, their systolic pressure was __________.

Accepted Answer

A) 130 Pa 
B) 130 mm Hg 
C) 80 Pa 
D) 80 mm Hg 
E) 80 psi 
A) 130 Pa 
B) 130 mm Hg 
C) 80 Pa 
D) 80 mm Hg 
E) 80 psi

Question 8

Of the following, __________ has the odor of rotting eggs.

Accepted Answer

A) NH3 
B) H2S 
C) CO 
D) NO2 
E) HCN 
A) NH3 
B) H2S 
C) CO 
D) NO2 
E) HCN

Question 9

The volume of fluorine gas required to react with 4.26 g of calcium bromide to form calcium fluoride and bromine at 25.0°C and 4195 torr is __________ L.

Accepted Answer

A) 0.0943 
B) 0.241 
C) 241 
D) 1.24 × 10-4 
E) 0.124 
A) 0.0943 
B) 0.241 
C) 241 
D) 1.24 × 10-4 
E) 0.124

Question 10

Of the following, __________ has a slight odor of bitter almonds and is toxic.

Accepted Answer

A) NH3 
B) N2O 
C) CO 
D) CH4 
E) HCN 
A) NH3 
B) N2O 
C) CO 
D) CH4 
E) HCN

Question 11

Automobile air bags use the decomposition of sodium azide as their source of gas for rapid inflation: 2NaN3 (s)→ 2Na (s)+ 3N2 (g).
What mass (g)of NaN3 is required to provide 40.0 L of N2 at 25.0°C and 763 torr?

Accepted Answer

A) 1.64 
B) 1.09 
C) 160 
D) 71.1 
E) 107 
A) 1.64 
B) 1.09 
C) 160 
D) 71.1 
E) 107

Question 12

Kinetic-molecular theory assumes that attractive and repulsive forces between gas particles are stronger than those between gas particles and container walls.

Accepted Answer

A) True 
 B)False

Question 13

A sample of gas (24.2 g)initially at 6.00 atm was compressed from 8.00 L to 2.00 L at constant temperature. After the compression, the gas pressure was __________ atm.

Accepted Answer

A) 12.0 
B) 16.0 
C) 18.0 
D) 20.0 
E) 24.0 
A) 12.0 
B) 16.0 
C) 18.0 
D) 20.0 
E) 24.0

Question 14

The pressure exerted by 1.5 mol of gas in a 13 L flask at 22°C is __________ kPa.

Accepted Answer

A) 560 
B) 280 
C) 18 
D) 2.4 
E) 1.0 
A) 560 
B) 280 
C) 18 
D) 2.4 
E) 1.0

Question 15

Two deviations of real gases from ideal gases which are treated in the van der Waals equation are finite molecular volume and non-zero molecular attractions.

Accepted Answer

A) True 
 B)False

Question 16

The molar volume of a gas at STP is __________ L.

Accepted Answer

A) 0.08206 
B) 62.36 
C) 1.00 
D) 22.4 
E) 14.7 
A) 0.08206 
B) 62.36 
C) 1.00 
D) 22.4 
E) 14.7

Question 17

What volume (L)of NH3 gas at STP is produced by the complete reaction of 7.5 g of H2O according to the following reaction? Mg3N2 (s)+ 6H2O (l)→ 3Mg(OH)2 (aq)+ 2NH3 (g)

Accepted Answer

A) 3.1 
B) 9.3 
C) 19 
D) 28 
E) 0.32 
A) 3.1 
B) 9.3 
C) 19 
D) 28 
E) 0.32

Question 18

The van der Waals equation for real gases recognizes that __________.

Accepted Answer

A) gas particles have non-zero volumes and interact with each other 
B) molar volumes of gases of different types are different 
C) the non-zero volumes of gas particles effectively decrease the amount of "empty space" between them 
D) the molecular attractions between particles of gas decreases the pressure exerted by the gas 
E) all of the above statements are true 
A) gas particles have non-zero volumes and interact with each other 
B) molar volumes of gases of different types are different 
C) the non-zero volumes of gas particles effectively decrease the amount of "empty space" between them 
D) the molecular attractions between particles of gas decreases the pressure exerted by the gas 
E) all of the above statements are true

Question 19

A sample of gas (1.3 mol)occupies __________ L at 22°C and 4.5 atm.

Accepted Answer

A) .079 
B) .52 
C) 7.0 
D) 13 
E) .032 
A) .079 
B) .52 
C) 7.0 
D) 13 
E) .032

Question 20

A vessel contained N2, Ar, He, and Ne. The total pressure in the vessel was 987 torr. The partial pressures of nitrogen, argon, and helium were 44.0, 486, and 218 torr, respectively. The partial pressure of neon in the vessel was __________ torr.

Accepted Answer

A) 42.4 
B) 521 
C) 19.4 
D) 239 
E) 760 
A) 42.4 
B) 521 
C) 19.4 
D) 239 
E) 760

Exam 10: Gases

If 50.75 g of a gas occupies 10.0 L at STP, 129.3 g of the gas will occupy __________ L at STP.

The kinetic-molecular theory predicts that pressure rises as the temperature of a gas increases because __________.

Of the following, only __________ is impossible for an ideal gas.

The root-mean-square speed of H2S at 26.0°C is __________ m/sec.

The van der Waals equation corrects the ideal gas law for the finite volume and __________ of gas molecules.

A sample of a gas (5.0 mol)at 1.0 atm is expanded at constant temperature from 10 L to 15 L. The final pressure is __________ atm.

If one was told that their blood pressure was 130/80, their systolic pressure was __________.

Of the following, __________ has the odor of rotting eggs.

The volume of fluorine gas required to react with 4.26 g of calcium bromide to form calcium fluoride and bromine at 25.0°C and 4195 torr is __________ L.

Of the following, __________ has a slight odor of bitter almonds and is toxic.

Automobile air bags use the decomposition of sodium azide as their source of gas for rapid inflation: 2NaN3 (s)→ 2Na (s)+ 3N2 (g). What mass (g)of NaN3 is required to provide 40.0 L of N2 at 25.0°C and 763 torr?

Kinetic-molecular theory assumes that attractive and repulsive forces between gas particles are stronger than those between gas particles and container walls.

A sample of gas (24.2 g)initially at 6.00 atm was compressed from 8.00 L to 2.00 L at constant temperature. After the compression, the gas pressure was __________ atm.

The pressure exerted by 1.5 mol of gas in a 13 L flask at 22°C is __________ kPa.

Two deviations of real gases from ideal gases which are treated in the van der Waals equation are finite molecular volume and non-zero molecular attractions.

The molar volume of a gas at STP is __________ L.

What volume (L)of NH3 gas at STP is produced by the complete reaction of 7.5 g of H2O according to the following reaction? Mg3N2 (s)+ 6H2O (l)→ 3Mg(OH)2 (aq)+ 2NH3 (g)

The van der Waals equation for real gases recognizes that __________.

A sample of gas (1.3 mol)occupies __________ L at 22°C and 4.5 atm.

A vessel contained N2, Ar, He, and Ne. The total pressure in the vessel was 987 torr. The partial pressures of nitrogen, argon, and helium were 44.0, 486, and 218 torr, respectively. The partial pressure of neon in the vessel was __________ torr.

Introduction: Matter and Measurement

Atoms, Molecules, and Ions

Stoichiometry: Calculations With Chemical Formulas and Equations

Aqueous Reactions and Solution Stoichiometry

Thermochemistry

Electronic Structure of Atoms

Periodic Properties of the Elements

Basic Concepts of Chemical Bonding

Molecular Geometry and Bonding Theories

Liquids and Intermolecular Forces

Solids and Modern Materials

Properties of Solutions

Chemical Kinetics

Chemical Equilibrium

Acid-Base Equilibria

Additional Aspects of Aqueous Equilibria

Chemistry of the Environment

Chemical Thermodynamics

Electrochemistry

Nuclear Chemistry

Chemistry of the Nonmetals

Transition Metals and Coordination Chemistry

The Chemistry of Life: Organic and Biological Chemistry

Filters

The root-mean-square speed of H₂S at 26.0°C is __________ m/sec.

Automobile air bags use the decomposition of sodium azide as their source of gas for rapid inflation: 2NaN₃ (s)→ 2Na (s)+ 3N₂ (g). What mass (g)of NaN₃ is required to provide 40.0 L of N₂ at 25.0°C and 763 torr?

What volume (L)of NH₃ gas at STP is produced by the complete reaction of 7.5 g of H₂O according to the following reaction? Mg₃N₂ (s)+ 6H₂O (l)→ 3Mg(OH)₂ (aq)+ 2NH₃ (g)

A vessel contained N₂, Ar, He, and Ne. The total pressure in the vessel was 987 torr. The partial pressures of nitrogen, argon, and helium were 44.0, 486, and 218 torr, respectively. The partial pressure of neon in the vessel was __________ torr.