Question 1

SO2 (5.00 g)and CO2 (5.00 g)were placed in a 750.0 mL container at 50.0 °C.The partial pressure of CO2 in the container was ________ atm.

Accepted Answer

A) 6.78 
B) 2.76 
C) 1.60 
D) 0.192 
E) 4.02 
A) 6.78 
B) 2.76 
C) 1.60 
D) 0.192 
E) 4.02

Question 2

Arrange the following gases in order of increasing average molecular speed at 25 °C. He,O2,CO2,N2

Accepted Answer

A) He 2 2 2 
B) He 2 2 2 
C) CO2 2 2 2 2 2 2 2 2 
A) He 2 2 2 
B) He 2 2 2 
C) CO2 2 2 2 2 2 2 2 2

Question 3

If pressure and temperature are kept constant,the reaction of 38 mL of Cl2 gas with 22 mL of CH4 gas via the equation: Cl2 (g)+ CH4 (g)→ HCl (g)+ CH3Cl (g)
Will produce a total of ________ mL of products.

Accepted Answer

A) 16 
B) 30 
C) 60 
D) 38 
E) 22 
A) 16 
B) 30 
C) 60 
D) 38 
E) 22

Question 4

What volume (mL)of sulfur dioxide can be produced by the complete reaction of 3.82 g of calcium sulfite with excess HCl (aq),when the final SO2 pressure is 827 torr at 44.0 °C?

Accepted Answer

A) 7.60 × 102 
B) 1.39 × 10-4 
C) 1.00 × 10-3 
D) 0.106 
E) 5.78 × 102 
A) 7.60 × 102 
B) 1.39 × 10-4 
C) 1.00 × 10-3 
D) 0.106 
E) 5.78 × 102

Question 5

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 × 104 Pa 
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 × 104 Pa 
C) 0.760 atm = 578 mm Hg 
D) 1.0 torr = 2.00 mm Hg 
E) 1.00 atm = 760 torr

Question 6

Which of the following is not a unit of pressure?

Accepted Answer

A) mm Hg 
B) mm 
C) atm 
D) Pa 
E) psi 
A) mm Hg 
B) mm 
C) atm 
D) Pa 
E) psi

Question 7

Which statement about atmospheric pressure is false?

Accepted Answer

A) As air becomes thinner, its density decreases. 
B) Air actually has weight. 
C) With an increase in altitude, atmospheric pressure increases as well. 
D) The warmer the air, the lower the atmospheric pressure. 
E) Atmospheric pressure prevents water in lakes, rivers, and oceans from boiling away. 
A) As air becomes thinner, its density decreases. 
B) Air actually has weight. 
C) With an increase in altitude, atmospheric pressure increases as well. 
D) The warmer the air, the lower the atmospheric pressure. 
E) Atmospheric pressure prevents water in lakes, rivers, and oceans from boiling away.

Question 8

The main component of air is oxygen.

Accepted Answer

A) True 
 B)False

Question 9

What is the rms speed (m/s)of oxygen molecules at 36.0 °C?

Accepted Answer

The answer of What is the rms speed (m/s)of oxygen...

Question 10

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 11

A gas originally at 27 °C and 1.00 atm pressure in a 3.3 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) 3.1 
C) 3.3 
D) 3.5 
E) 0.24 
A) 0.27 
B) 3.1 
C) 3.3 
D) 3.5 
E) 0.24

Question 12

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 13

760 torr is equivalent to ________ mm Hg.

Accepted Answer

A) 380 
B) 4.78 × 103 
C) 1 
D) 760 
E) 121 
A) 380 
B) 4.78 × 103 
C) 1 
D) 760 
E) 121

Question 14

A balloon originally had a volume of 4.39 L at 44 °C and a pressure of 729 torr.The balloon must be cooled to ________ °C to reduce its volume to 3.99 L (at constant pressure).

Accepted Answer

A) 0.00 
B) 15.1 
C) -288 
D) 288 
E) 546 
A) 0.00 
B) 15.1 
C) -288 
D) 288 
E) 546

Question 15

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

Accepted Answer

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

Question 16

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 17

A fixed amount of gas at 25.0 °C occupies a volume of 10.0 L when the pressure is 751 torr.Use Boyle's law to calculate the pressure (torr)when the volume is reduced to 7.25 L at a constant temperature of

Accepted Answer

A) 1.04 × 103 
B) 0.097 
C) 5.44 ×   
D) 544 
E) 1.36 
A) 1.04 × 103 
B) 0.097 
C) 5.44 ×   
D) 544 
E) 1.36

Question 18

A gas mixture of N2 and H2 has a total pressure of 9.40 atm and contains 11.3 mol of gas.If the partial pressure of N2 is 4.89 atm,how many moles of H2 are in the mixture?

Accepted Answer

A) 4.51 
B) 5.65 
C) 5.42 
D) 11.3 
E) 5.88 
A) 4.51 
B) 5.65 
C) 5.42 
D) 11.3 
E) 5.88

Question 19

A sample of CO2 gas (3.0 mol)effused through a pinhole in 18.0 s.It will take ________ s for the same amount of H2 to effuse under the same conditions.

Accepted Answer

A) 396 
B) 3.84 
C) 0.818 
D) 84.4 
E) 1.92 
A) 396 
B) 3.84 
C) 0.818 
D) 84.4 
E) 1.92

Question 20

A flask contains a mixture of N2 and H2 at a total pressure of 5.20 atm.If there are 1.00 mol of H2 and 8.00 mol of N2 in the flask,what is the partial pressure (atm)of N2?

Accepted Answer

A) 2.60 
B) 4.62 
C) 5.20 
D) 8.00 
E) 0.578 
A) 2.60 
B) 4.62 
C) 5.20 
D) 8.00 
E) 0.578

Exam 10: Gases

SO2 (5.00 g)and CO2 (5.00 g)were placed in a 750.0 mL container at 50.0 °C.The partial pressure of CO2 in the container was ________ atm.

Arrange the following gases in order of increasing average molecular speed at 25 °C. He,O2,CO2,N2

If pressure and temperature are kept constant,the reaction of 38 mL of Cl2 gas with 22 mL of CH4 gas via the equation: Cl2 (g)+ CH4 (g)→ HCl (g)+ CH3Cl (g) Will produce a total of ________ mL of products.

What volume (mL)of sulfur dioxide can be produced by the complete reaction of 3.82 g of calcium sulfite with excess HCl (aq),when the final SO2 pressure is 827 torr at 44.0 °C?

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

Which of the following is not a unit of pressure?

Which statement about atmospheric pressure is false?

The main component of air is oxygen.

What is the rms speed (m/s)of oxygen molecules at 36.0 °C?

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

A gas originally at 27 °C and 1.00 atm pressure in a 3.3 L flask is cooled at constant pressure until the temperature is 11 °C.The new volume of the gas is ________ L.

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

760 torr is equivalent to ________ mm Hg.

A balloon originally had a volume of 4.39 L at 44 °C and a pressure of 729 torr.The balloon must be cooled to ________ °C to reduce its volume to 3.99 L (at constant pressure).

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

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.

A fixed amount of gas at 25.0 °C occupies a volume of 10.0 L when the pressure is 751 torr.Use Boyle's law to calculate the pressure (torr)when the volume is reduced to 7.25 L at a constant temperature of

A gas mixture of N2 and H2 has a total pressure of 9.40 atm and contains 11.3 mol of gas.If the partial pressure of N2 is 4.89 atm,how many moles of H2 are in the mixture?

A sample of CO2 gas (3.0 mol)effused through a pinhole in 18.0 s.It will take ________ s for the same amount of H2 to effuse under the same conditions.

A flask contains a mixture of N2 and H2 at a total pressure of 5.20 atm.If there are 1.00 mol of H2 and 8.00 mol of N2 in the flask,what is the partial pressure (atm)of N2?

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

SO₂ (5.00 g)and CO₂ (5.00 g)were placed in a 750.0 mL container at 50.0 °C.The partial pressure of CO₂ in the container was ________ atm.

Arrange the following gases in order of increasing average molecular speed at 25 °C. He,O₂,CO₂,N₂

If pressure and temperature are kept constant,the reaction of 38 mL of Cl₂ gas with 22 mL of CH₄ gas via the equation: Cl₂ (g)+ CH₄ (g)→ HCl (g)+ CH₃Cl (g) Will produce a total of ________ mL of products.

What volume (mL)of sulfur dioxide can be produced by the complete reaction of 3.82 g of calcium sulfite with excess HCl (aq),when the final SO₂ pressure is 827 torr at 44.0 °C?

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

A gas mixture of N₂ and H₂ has a total pressure of 9.40 atm and contains 11.3 mol of gas.If the partial pressure of N₂ is 4.89 atm,how many moles of H₂ are in the mixture?

A sample of CO₂ gas (3.0 mol)effused through a pinhole in 18.0 s.It will take ________ s for the same amount of H₂ to effuse under the same conditions.

A flask contains a mixture of N₂ and H₂ at a total pressure of 5.20 atm.If there are 1.00 mol of H₂ and 8.00 mol of N₂ in the flask,what is the partial pressure (atm)of N₂?