Question 1

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 2

The average kinetic energy of the particles of a gas is directly proportional to __________.

Accepted Answer

A) the rms speed 
B) the square of the rms speed 
C) the square root of the rms speed 
D) the square of the particle mass 
E) the particle mass 
A) the rms speed 
B) the square of the rms speed 
C) the square root of the rms speed 
D) the square of the particle mass 
E) the particle mass

Question 3

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 4

If the temperature is lowered from 60°C to 30°C, the volume of a fixed amount of gas will be one half the original volume.

Accepted Answer

A) True 
 B)False

Question 5

A gas originally at 27°C and 1.00 atm pressure in a 3.9 L flask is cooled at constant pressure until the temperature is 11°C. The new volume of the gas is __________ L.

Accepted Answer

A) 0.27 
B) 3.7 
C) 3.9 
D) 4.1 
E) 0.24 
A) 0.27 
B) 3.7 
C) 3.9 
D) 4.1 
E) 0.24

Question 6

The deviation from ideal behavior of a gas is most evident at __________ and/or low temperature.

Accepted Answer

The answer of The deviation from ideal behavior of a...

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 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 9

The pressure of a sample of CH4 gas (6.022 g)in a 30.0 L vessel at 402 K is __________ atm.

Accepted Answer

A) 2.42 
B) 6.62 
C) 0.413 
D) 12.4 
E) 22.4 
A) 2.42 
B) 6.62 
C) 0.413 
D) 12.4 
E) 22.4

Question 10

Of the following, __________ is a correct statement of Boyle's law.

Accepted Answer

A) PV = constant 
B)    = constant 
C)    = constant 
D)    = constant 
E)    = constant 
A) PV = constant 
B)    = constant 
C)    = constant 
D)    = constant 
E)    = constant

Question 11

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 12

A gas mixture of Ne and Ar has a total pressure of 4.00 atm and contains 16.0 mol of gas. If the partial pressure of Ne is 2.75 atm, how many moles of Ar are in the mixture?

Accepted Answer

A) 11.0 
B) 5.00 
C) 6.75 
D) 9.25 
E) 12.0 
A) 11.0 
B) 5.00 
C) 6.75 
D) 9.25 
E) 12.0

Question 13

Which one of the following gases would deviate the least from ideal gas behavior?

Accepted Answer

A) Ne 
B) CH3Cl 
C) Kr 
D) CO2 
E) F2 
A) Ne 
B) CH3Cl 
C) Kr 
D) CO2 
E) F2

Question 14

The temperature of a sample of CH4 gas (10.34 g)in a 50.0 L vessel at 1.33 atm is __________ °C.

Accepted Answer

A) 984 
B) -195 
C) 195 
D) 1260 
E) -1260 
A) 984 
B) -195 
C) 195 
D) 1260 
E) -1260

Question 15

The density of NO2 in a 4.50 L tank at 760.0 torr and 25.0°C is __________ g/L.

Accepted Answer

A) 1.64 
B) 9.30 
C) 1.68 
D) 1.88 
E) 3.27 
A) 1.64 
B) 9.30 
C) 1.68 
D) 1.88 
E) 3.27

Question 16

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 17

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 18

One significant difference between gases and liquids is that __________.

Accepted Answer

A) a gas is made up of molecules 
B) a gas assumes the volume of its container 
C) a gas may consist of both elements and compounds 
D) gases are always mixtures 
E) All of the above answers are correct. 
A) a gas is made up of molecules 
B) a gas assumes the volume of its container 
C) a gas may consist of both elements and compounds 
D) gases are always mixtures 
E) All of the above answers are correct.

Question 19

Given the equation:
C2H6 (g)+ O2 (g)→ CO2 (g)+ H2O (g)(not balanced)
Determine the number of liters of O2 consumed at STP when 270.0 grams of C2H6 is burned.

Accepted Answer

Question 20

Which of the following equations shows an incorrect relationship between pressures given in terms of different units?

Accepted Answer

A) 1.20 atm = 122 kPa 
B) 152 mm Hg = 2.03 × 104Pa 
C) 0.760 atm = 578 mm Hg 
D) 1.0 torr = 2.00 mm Hg 
E) 1.00 atm = 760 torr 
A) 1.20 atm = 122 kPa 
B) 152 mm Hg = 2.03 × 104Pa 
C) 0.760 atm = 578 mm Hg 
D) 1.0 torr = 2.00 mm Hg 
E) 1.00 atm = 760 torr

Exam 10: Gases

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

The average kinetic energy of the particles of a gas is directly proportional to __________.

If the temperature is lowered from 60°C to 30°C, the volume of a fixed amount of gas will be one half the original volume.

A gas originally at 27°C and 1.00 atm pressure in a 3.9 L flask is cooled at constant pressure until the temperature is 11°C. The new volume of the gas is __________ L.

The deviation from ideal behavior of a gas is most evident at __________ and/or low temperature.

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

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

The pressure of a sample of CH4 gas (6.022 g)in a 30.0 L vessel at 402 K is __________ atm.

Of the following, __________ is a correct statement of Boyle's law.

Gaseous mixtures __________.

A gas mixture of Ne and Ar has a total pressure of 4.00 atm and contains 16.0 mol of gas. If the partial pressure of Ne is 2.75 atm, how many moles of Ar are in the mixture?

Which one of the following gases would deviate the least from ideal gas behavior?

The temperature of a sample of CH4 gas (10.34 g)in a 50.0 L vessel at 1.33 atm is __________ °C.

The density of NO2 in a 4.50 L tank at 760.0 torr and 25.0°C is __________ g/L.

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

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

One significant difference between gases and liquids is that __________.

Given the equation: C2H6 (g)+ O2 (g)→ CO2 (g)+ H2O (g)(not balanced) Determine the number of liters of O2 consumed at STP when 270.0 grams of C2H6 is burned.

Which of the following equations shows an incorrect relationship between pressures given in terms of different units?

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

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

The pressure of a sample of CH₄ gas (6.022 g)in a 30.0 L vessel at 402 K is __________ atm.

The temperature of a sample of CH₄ gas (10.34 g)in a 50.0 L vessel at 1.33 atm is __________ °C.

The density of NO₂ in a 4.50 L tank at 760.0 torr and 25.0°C is __________ g/L.

Given the equation: C₂H₆ (g)+ O₂ (g)→ CO₂ (g)+ H₂O (g)(not balanced) Determine the number of liters of O₂ consumed at STP when 270.0 grams of C₂H₆ is burned.