Question 1

Which one of the following is a valid statement of Avogadro's law?

Accepted Answer

A)    = constant 
B)    = constant 
C) PV = constant 
D) V = constant × n 
E) V = constant × P 
A)    = constant 
B)    = constant 
C) PV = constant 
D) V = constant × n 
E) V = constant × P

Question 2

According to kinetic-molecular theory,in which of the following gases will the root-mean-square speed of the molecules be the highest at 200 °C?

Accepted Answer

A) HCl 
B) Cl2 
C) H2O 
D) SF6 
E) None. The molecules of all gases have the same root-mean-square speed at any given temperature. 
A) HCl 
B) Cl2 
C) H2O 
D) SF6 
E) None. The molecules of all gases have the same root-mean-square speed at any given temperature.

Question 3

Of the following,________ has a strong acrid odor.

Accepted Answer

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

Question 4

How many moles of gas are there in a 36.3 L container at 25.2 °C and 570.3 mm Hg?

Accepted Answer

A) 1.11 
B) 13.2 
C) 0.863 
D) 0.0110 
E) 16,700 
A) 1.11 
B) 13.2 
C) 0.863 
D) 0.0110 
E) 16,700

Question 5

Calculate the density of hydrogen gas (in g/L)at 43.0 °C and 700.0 torr.

Accepted Answer

The answer of Calculate the density of hydrogen gas (in...

Question 6

A gas vessel is attached to an open-end manometer filled with a nonvolatile liquid of density 0.993 g/mL as shown below.   The difference in heights of the liquid in the two sides of the manometer is 32.3 mm when the atmospheric pressure is 765 mm Hg.Given that the density of mercury is 13.6 g/mL,the pressure of the enclosed gas is ________ atm.

Accepted Answer

A) 1.05 
B) 1.01 
C) 0.976 
D) 0.993 
E) 1.08 
A) 1.05 
B) 1.01 
C) 0.976 
D) 0.993 
E) 1.08

Question 7

The effusion rate of a gas is proportional to the square root of its molar mass.

Accepted Answer

A) True 
 B)False

Question 8

The amount of gas that occupies 36.52 L at 68.0 °C and 672 mm Hg is ________ mol.

Accepted Answer

A) 127 
B) 1.15 
C) 878 
D) 24.4 
E) 12.7 
A) 127 
B) 1.15 
C) 878 
D) 24.4 
E) 12.7

Question 9

A gas vessel is attached to an open-end manometer containing a nonvolatile liquid of density 0.791 g/mL as shown below.   The difference in heights of the liquid in the two sides of the manometer is 43.4 cm when the atmospheric pressure is 755 mm Hg.Given that the density of mercury is 13.6 g/mL,the pressure of the enclosed gas is ________ atm.

Accepted Answer

A) 1.03 
B) 0.967 
C) 0.993 
D) 0.990 
E) 0.987 
A) 1.03 
B) 0.967 
C) 0.993 
D) 0.990 
E) 0.987

Question 10

The temperature of an ideal gas at STP is ________.

Accepted Answer

A) 0 °C 
B) -32 °F 
C) -273 K 
D) 0 °F 
E) 0 K 
A) 0 °C 
B) -32 °F 
C) -273 K 
D) 0 °F 
E) 0 K

Question 11

The density of nitric oxide (NO)gas at 0.970 atm and 34.9 °C is ________ g/L.

Accepted Answer

A) 0.0384 
B) 0.869 
C) 1.15 
D) 0.339 
E) 10.2 
A) 0.0384 
B) 0.869 
C) 1.15 
D) 0.339 
E) 10.2

Question 12

Sodium hydride reacts with excess water to produce aqueous sodium hydroxide and hydrogen gas: NaH (s)+ H2O (l)→ NaOH (aq)+ H2 (g)
A sample of NaH weighing ________ g will produce 982 mL of gas at 28.0 °C and 765 torr,when the hydrogen is collected over water.The vapor pressure of water at this temperature is 28 torr.

Accepted Answer

A) 2.93 
B) 0.960 
C) 0.925 
D) 0.0388 
E) 925 
A) 2.93 
B) 0.960 
C) 0.925 
D) 0.0388 
E) 925

Question 13

Gaseous mixtures ________.

Accepted Answer

A) can only contain molecules 
B) are all heterogeneous 
C) can only contain isolated atoms 
D) are all homogeneous 
E) must contain both isolated atoms and molecules 
A) can only contain molecules 
B) are all heterogeneous 
C) can only contain isolated atoms 
D) are all homogeneous 
E) must contain both isolated atoms and molecules

Question 14

Sulfur dioxide (12.4 g)and carbon dioxide (12.4 g)are placed in a 500.0 mL container at 45.0 °C.What is the partial pressure (atm)of sulfur dioxide in the container?

Accepted Answer

A) 0.0101 
B) 5.06 
C) 10.1 
D) 648 
E) 9.48 
A) 0.0101 
B) 5.06 
C) 10.1 
D) 648 
E) 9.48

Question 15

A gas mixture of He and Ar has a total pressure of 4.10 atm.What is the mole fraction of Ar if the partial pressure of Ar is 1.50 atm?

Accepted Answer

A) 0.634 
B) 2.6 
C) 36.6 
D) 0.366 
E) 63.4 
A) 0.634 
B) 2.6 
C) 36.6 
D) 0.366 
E) 63.4

Question 16

What is the density (g/L)of bromine gas at STP?

Accepted Answer

A) 6.53 
B) 3.26 
C) 3.56 
D) 0.140 
E) 7.13 
A) 6.53 
B) 3.26 
C) 3.56 
D) 0.140 
E) 7.13

Question 17

The density of air at STP is 1.285 g/L.Which of the following cannot be used to fill a balloon that will float in air at STP?

Accepted Answer

A) CH4 
B) NO 
C) Ne 
D) NH3 
E) HF 
A) CH4 
B) NO 
C) Ne 
D) NH3 
E) HF

Question 18

If pressure and temperature are kept constant,the reaction of 29 mL of N2 gas with 87 mL of H2 gas will form ________ mL of ammonia.

Accepted Answer

A) 29 
B) 43.5 
C) 58 
D) 174 
E) 14.5 
A) 29 
B) 43.5 
C) 58 
D) 174 
E) 14.5

Question 19

How many liters of O2 are consumed during the combustion of 60.0 grams of ethane at STP in the open atmosphere?

Accepted Answer

Question 20

A sample of hydrogen gas (3.2 L)at 3.5 atm and 25 °C was combined with 5.2 L of nitrogen gas at 7.3 atm and 25 °C at constant temperature in a 15.0 L flask.Assuming the initial pressure in the flask was 0.00 atm and the temperature upon mixing was 25 °C,what is the total pressure (atm)in the flask?

Accepted Answer

A) 3.28 
B) 5.85 
C) 9.45 
D) 15.4 
E) 10.8 
A) 3.28 
B) 5.85 
C) 9.45 
D) 15.4 
E) 10.8

Which one of the following is a valid statement of Avogadro's law?

According to kinetic-molecular theory,in which of the following gases will the root-mean-square speed of the molecules be the highest at 200 °C?

Of the following,________ has a strong acrid odor.

How many moles of gas are there in a 36.3 L container at 25.2 °C and 570.3 mm Hg?

Calculate the density of hydrogen gas (in g/L)at 43.0 °C and 700.0 torr.

The effusion rate of a gas is proportional to the square root of its molar mass.

The amount of gas that occupies 36.52 L at 68.0 °C and 672 mm Hg is ________ mol.

The temperature of an ideal gas at STP is ________.

The density of nitric oxide (NO)gas at 0.970 atm and 34.9 °C is ________ g/L.

Gaseous mixtures ________.

Sulfur dioxide (12.4 g)and carbon dioxide (12.4 g)are placed in a 500.0 mL container at 45.0 °C.What is the partial pressure (atm)of sulfur dioxide in the container?

A gas mixture of He and Ar has a total pressure of 4.10 atm.What is the mole fraction of Ar if the partial pressure of Ar is 1.50 atm?

What is the density (g/L)of bromine gas at STP?

The density of air at STP is 1.285 g/L.Which of the following cannot be used to fill a balloon that will float in air at STP?

If pressure and temperature are kept constant,the reaction of 29 mL of N₂ gas with 87 mL of H₂ gas will form ________ mL of ammonia.

How many liters of O₂ are consumed during the combustion of 60.0 grams of ethane at STP in the open atmosphere?

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

Exam 10: Gases

Which one of the following is a valid statement of Avogadro's law?

According to kinetic-molecular theory,in which of the following gases will the root-mean-square speed of the molecules be the highest at 200 °C?

Of the following,________ has a strong acrid odor.

How many moles of gas are there in a 36.3 L container at 25.2 °C and 570.3 mm Hg?

Calculate the density of hydrogen gas (in g/L)at 43.0 °C and 700.0 torr.

The effusion rate of a gas is proportional to the square root of its molar mass.

The amount of gas that occupies 36.52 L at 68.0 °C and 672 mm Hg is ________ mol.

The temperature of an ideal gas at STP is ________.

The density of nitric oxide (NO)gas at 0.970 atm and 34.9 °C is ________ g/L.

Gaseous mixtures ________.

Sulfur dioxide (12.4 g)and carbon dioxide (12.4 g)are placed in a 500.0 mL container at 45.0 °C.What is the partial pressure (atm)of sulfur dioxide in the container?

A gas mixture of He and Ar has a total pressure of 4.10 atm.What is the mole fraction of Ar if the partial pressure of Ar is 1.50 atm?

What is the density (g/L)of bromine gas at STP?

The density of air at STP is 1.285 g/L.Which of the following cannot be used to fill a balloon that will float in air at STP?

If pressure and temperature are kept constant,the reaction of 29 mL of N2 gas with 87 mL of H2 gas will form ________ mL of ammonia.

How many liters of O2 are consumed during the combustion of 60.0 grams of ethane at STP in the open atmosphere?

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

If pressure and temperature are kept constant,the reaction of 29 mL of N₂ gas with 87 mL of H₂ gas will form ________ mL of ammonia.

How many liters of O₂ are consumed during the combustion of 60.0 grams of ethane at STP in the open atmosphere?