Question 1

Using the van der Waals equation,the pressure in a 22.4 L vessel containing 1.50 mol of chlorine gas at 0.00 °C is ________ atm. (a = 6.49 L2-atm/mol2,b = 0.0562 L/mol)

Accepted Answer

A) 0.993 
B) 1.50 
C) 0.676 
D) 1.91 
E) 1.48 
A) 0.993 
B) 1.50 
C) 0.676 
D) 1.91 
E) 1.48

Question 2

The volume of a sample of gas (2.49 g)was 752 mL at 1.98 atm and 62 °C.The gas is ________.

Accepted Answer

A) SO2 
B) SO3 
C) NH3 
D) NO2 
E) Ne 
A) SO2 
B) SO3 
C) NH3 
D) NO2 
E) Ne

Question 3

A gas at a pressure of 10.0 Pa exerts a force of ________ N on an area of 5.5 m2.

Accepted Answer

A) 55 
B) 0.55 
C) 5.5 
D) 1.8 
E) 18 
A) 55 
B) 0.55 
C) 5.5 
D) 1.8 
E) 18

Question 4

Ammonium nitrite undergoes thermal decomposition to produce only gases: NH4NO2 (s)→ N2 (g)+ 2H2O (g)
What volume (L)of gas is produced by the decomposition of 35.0 g of NH4NO2(s)at 525 °C and 1.5 atm?

Accepted Answer

A) 48 
B) 160 
C) 15 
D) 72 
E) 24 
A) 48 
B) 160 
C) 15 
D) 72 
E) 24

Question 5

The volume of HCl gas required to react with excess magnesium metal to produce 6.82 L of hydrogen gas at 2.19 atm and 35.0 °C is ________ L.

Accepted Answer

A) 6.82 
B) 2.19 
C) 13.6 
D) 4.38 
E) 3.41 
A) 6.82 
B) 2.19 
C) 13.6 
D) 4.38 
E) 3.41

Question 6

A sample of oxygen gas was found to effuse at a rate equal to two times that of an unknown gas.The molecular weight of the unknown gas is ________ g/mol.

Accepted Answer

A) 64 
B) 128 
C) 8 
D) 16 
E) 8.0 
A) 64 
B) 128 
C) 8 
D) 16 
E) 8.0

Question 7

Which noble gas is expected to show the largest deviations from the ideal gas behavior?

Accepted Answer

A) helium 
B) neon 
C) argon 
D) krypton 
E) xenon 
A) helium 
B) neon 
C) argon 
D) krypton 
E) xenon

Question 8

The volume of 0.15 mol of an ideal gas at 365 torr and 97 °C is ________ L.

Accepted Answer

A) 0.054 
B) 2.5 
C) 11 
D) 9.5 
E) 0.024 
A) 0.054 
B) 2.5 
C) 11 
D) 9.5 
E) 0.024

Question 9

Standard temperature and pressure (STP),in the context of gases,refers to ________.

Accepted Answer

A) 298.15 K and 1 atm 
B) 273.15 K and 1 atm 
C) 298.15 K and 1 torr 
D) 273.15 K and 1 pascal 
E) 273.15 K and 1 torr 
A) 298.15 K and 1 atm 
B) 273.15 K and 1 atm 
C) 298.15 K and 1 torr 
D) 273.15 K and 1 pascal 
E) 273.15 K and 1 torr

Question 10

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 11

How much CO2 (L)is produced when 2.10 kg of sodium bicarbonate reacts with excess hydrochloric acid at 25.0 °C and 1.23 atm?

Accepted Answer

A) 4.17 × 10-1 
B) 4.98 × 102 
C) 4.17 × 101 
D) 3.50 
E) 4.98 × 10-1 
A) 4.17 × 10-1 
B) 4.98 × 102 
C) 4.17 × 101 
D) 3.50 
E) 4.98 × 10-1

Question 12

Calcium hydride (   )reacts with water to form hydrogen gas:   (s)+   O (l)→   (aq)+   (g) How many grams of   are needed to generate 48.0 L of   gas at a pressure of 0.995 atm and a temperature of 32 °C?

Accepted Answer

A) 56.8 
B) 0.954 
C) 161 
D) 40.1 
E) 80.3 
A) 56.8 
B) 0.954 
C) 161 
D) 40.1 
E) 80.3

Question 13

A real gas will behave most like an ideal gas under conditions of ________.

Accepted Answer

A) high temperature and high pressure 
B) high temperature and low pressure 
C) low temperature and high pressure 
D) low temperature and low pressure 
E) STP 
A) high temperature and high pressure 
B) high temperature and low pressure 
C) low temperature and high pressure 
D) low temperature and low pressure 
E) STP

Question 14

A gas in a 57.1 L pressure container at 24.9 °C and 889.8 mm Hg contains ________ moles.

Accepted Answer

A) 32.7 
B) 2080 
C) 0.366 
D) 0.0270 
E) 2.73 
A) 32.7 
B) 2080 
C) 0.366 
D) 0.0270 
E) 2.73

Question 15

Which one of the following gases would have the highest average molecular speed at 25 °C?

Accepted Answer

A) O2 
B) N2 
C) CO2 
D) CH4 
E) SF6 
A) O2 
B) N2 
C) CO2 
D) CH4 
E) SF6

Question 16

Which of the following is not possible for an ideal gas?

Accepted Answer

A)    =   
B)    =   
C)    =     
D)      =     
E)    =   = 0 
A)    =   
B)    =   
C)    =     
D)      =     
E)    =   = 0

Question 17

What is the rms speed (m/s)of NO2 at 28.4 °C?

Accepted Answer

A) 40.2 
B) 124 
C) 233 
D) 12.8 
E) 404 
A) 40.2 
B) 124 
C) 233 
D) 12.8 
E) 404

Question 18

1.92 g of zinc metal reacts with excess hydrochloric acid to produce hydrogen gas.What volume (L)of hydrogen is generated at STP?

Accepted Answer

A) 43.1 
B) 0.656 
C) 6.03 × 10-2 
D) 0.719 
E) 47.0 
A) 43.1 
B) 0.656 
C) 6.03 × 10-2 
D) 0.719 
E) 47.0

Question 19

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 20

34.9 grams of hydrogen gas and 17.7 grams of methane gas are combined in a reaction vessel with a total pressure at 2.92 atm.What is the partial pressure (atm)of hydrogen gas?

Accepted Answer

A) 0.175 
B) 50.5 
C) 53.8 
D) 2.75 
E) 5.53 
A) 0.175 
B) 50.5 
C) 53.8 
D) 2.75 
E) 5.53

Exam 10: Gases

Using the van der Waals equation,the pressure in a 22.4 L vessel containing 1.50 mol of chlorine gas at 0.00 °C is ________ atm. (a = 6.49 L2-atm/mol2,b = 0.0562 L/mol)

The volume of a sample of gas (2.49 g)was 752 mL at 1.98 atm and 62 °C.The gas is ________.

A gas at a pressure of 10.0 Pa exerts a force of ________ N on an area of 5.5 m2.

Ammonium nitrite undergoes thermal decomposition to produce only gases: NH4NO2 (s)→ N2 (g)+ 2H2O (g) What volume (L)of gas is produced by the decomposition of 35.0 g of NH4NO2(s)at 525 °C and 1.5 atm?

The volume of HCl gas required to react with excess magnesium metal to produce 6.82 L of hydrogen gas at 2.19 atm and 35.0 °C is ________ L.

A sample of oxygen gas was found to effuse at a rate equal to two times that of an unknown gas.The molecular weight of the unknown gas is ________ g/mol.

Which noble gas is expected to show the largest deviations from the ideal gas behavior?

The volume of 0.15 mol of an ideal gas at 365 torr and 97 °C is ________ L.

Standard temperature and pressure (STP),in the context of gases,refers to ________.

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)

How much CO2 (L)is produced when 2.10 kg of sodium bicarbonate reacts with excess hydrochloric acid at 25.0 °C and 1.23 atm?

Calcium hydride ( )reacts with water to form hydrogen gas: (s)+ O (l)→ (aq)+ (g) How many grams of are needed to generate 48.0 L of gas at a pressure of 0.995 atm and a temperature of 32 °C?

A real gas will behave most like an ideal gas under conditions of ________.

A gas in a 57.1 L pressure container at 24.9 °C and 889.8 mm Hg contains ________ moles.

Which one of the following gases would have the highest average molecular speed at 25 °C?

Which of the following is not possible for an ideal gas?

What is the rms speed (m/s)of NO2 at 28.4 °C?

1.92 g of zinc metal reacts with excess hydrochloric acid to produce hydrogen gas.What volume (L)of hydrogen is generated at STP?

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

34.9 grams of hydrogen gas and 17.7 grams of methane gas are combined in a reaction vessel with a total pressure at 2.92 atm.What is the partial pressure (atm)of hydrogen gas?

Introduction: Matter, energy, and Measurement

Atoms, molecules, and Ions

Chemical Reactions and Reaction Stoichiometry

Reactions in Aqueous Solution

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

Using the van der Waals equation,the pressure in a 22.4 L vessel containing 1.50 mol of chlorine gas at 0.00 °C is ________ atm. (a = 6.49 L²-atm/mol²,b = 0.0562 L/mol)

A gas at a pressure of 10.0 Pa exerts a force of ________ N on an area of 5.5 m².

Ammonium nitrite undergoes thermal decomposition to produce only gases: NH₄NO₂ (s)→ N₂ (g)+ 2H₂O (g) What volume (L)of gas is produced by the decomposition of 35.0 g of NH₄NO₂(s)at 525 °C and 1.5 atm?

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)

How much CO₂ (L)is produced when 2.10 kg of sodium bicarbonate reacts with excess hydrochloric acid at 25.0 °C and 1.23 atm?

What is the rms speed (m/s)of NO₂ at 28.4 °C?