Question 1

What volume (L)of fluorine gas is required to react with 2.31 g of calcium bromide to form calcium fluoride and bromine gas at 8.19 atm and 35.0 °C?

Accepted Answer

A) 3.57 
B) 7.14 
C) 357 
D) 3.57 × 10-3 
E) 4.05 × 10-3 
A) 3.57 
B) 7.14 
C) 357 
D) 3.57 × 10-3 
E) 4.05 × 10-3

Question 2

A sample of an unknown volatile liquid was injected into a Dumas flask     and heated until no visible traces of the liquid could be found.The flask and its contents were then rapidly cooled and reweighed   The atmospheric pressure and temperature during the experiment were 0.976 atm and 18.0 °C,respectively.The unknown volatile liquid was ________.

Accepted Answer

A) C6H12 
B) C6H14 
C) C7H14 
D) C7H16 
E) C6H6 
A) C6H12 
B) C6H14 
C) C7H14 
D) C7H16 
E) C6H6

Question 3

A sample of an ideal gas (3.00 L)in a closed container at 25.0 °C and 76.0 torr is heated to 270 °C.The pressure of the gas at this temperature is ________ torr.

Accepted Answer

A) 912 
B) 138 
C) 76.5 
D) 39.5 
E) 0.0253 
A) 912 
B) 138 
C) 76.5 
D) 39.5 
E) 0.0253

Question 4

A gas mixture of Xe,Ne,and Ar has a total pressure of 12.20 atm.What is the mole fraction of Xe if the partial pressures of Ne and Ar are 2.10 and 4.50 atm,respectively?

Accepted Answer

A) 0.848 
B) 0.459 
C) 5.60 
D) 2.18 
E) 1.18 
A) 0.848 
B) 0.459 
C) 5.60 
D) 2.18 
E) 1.18

Question 5

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 6

How many moles of an unknown gas are in a 325 mL container at a pressure of 695 torr and 19 °C?

Accepted Answer

A) 9.42 
B) 1.48 × 10-2 
C) 12.4 
D) 1.24 × 10-2 
E) 80.6 
A) 9.42 
B) 1.48 × 10-2 
C) 12.4 
D) 1.24 × 10-2 
E) 80.6

Question 7

What is the density of carbon dioxide gas (g/L)at 1106.2 mm Hg and 56.3 °C?

Accepted Answer

A) 13.9 
B) 0.0234 
C) 2.37 
D) 1800 
E) 0.0538 
A) 13.9 
B) 0.0234 
C) 2.37 
D) 1800 
E) 0.0538

Question 8

What is the molecular weight (g/mol)of an unknown gas that has a density of 3.59 g/L at STP?

Accepted Answer

A) 7.37 
B) 87.9 
C) 0.0879 
D) 80.5 
E) 8.15 × 103 
A) 7.37 
B) 87.9 
C) 0.0879 
D) 80.5 
E) 8.15 × 103

Question 9

The pressure exerted by a column of liquid is equal to the product of the height of the column times the gravitational constant times the density of the liquid,   How high a column of methanol   would be supported by a pressure that supports a 713 mm column of mercury

Accepted Answer

A) 713 mm 
B) 41 mm 
C) 1.2 × 104 mm 
D) 9.7 × 103 mm 
E) 17 mm 
A) 713 mm 
B) 41 mm 
C) 1.2 × 104 mm 
D) 9.7 × 103 mm 
E) 17 mm

Question 10

At STP,the density of ________ is 1.70 g/L.

Accepted Answer

A) NO 
B) Ne 
C) CH4 
D) F2 
E) CO 
A) NO 
B) Ne 
C) CH4 
D) F2 
E) CO

Question 11

The density of krypton gas at 0.866 atm and 44.4 °C is ________ g/L.

Accepted Answer

A) 0.0332 
B) 0.359 
C) 2.78 
D) 5.57 
E) 0.238 
A) 0.0332 
B) 0.359 
C) 2.78 
D) 5.57 
E) 0.238

Question 12

A sample of a gas (1.50 mol)is contained in a 15.0 L cylinder.The temperature is increased from 100 °C to 150 °C.The ratio of final pressure to initial pressure [   ] is ________.

Accepted Answer

A) 1.50 
B) 0.667 
C) 0.882 
D) 1.13 
E) 1.00 
A) 1.50 
B) 0.667 
C) 0.882 
D) 1.13 
E) 1.00

Question 13

The root-mean-square speed of CO at 113 °C is ________ m/s.

Accepted Answer

A) 317 
B) 58.3 
C) 586 
D) 993 
E) 31.5 
A) 317 
B) 58.3 
C) 586 
D) 993 
E) 31.5

Question 14

10.0 grams of argon and 20.0 grams of neon are placed in a 1216.1 ml container at 25.1 °C.The partial pressure of neon is ________ atm.

Accepted Answer

A) 19.9 
B) 5.03 
C) 1.68 
D) 20.0 
E) 49.1 
A) 19.9 
B) 5.03 
C) 1.68 
D) 20.0 
E) 49.1

Question 15

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

Accepted Answer

A) 6.29 
B) 4.02 
C) 10.3 
D) 0.292 
E) 1.60 
A) 6.29 
B) 4.02 
C) 10.3 
D) 0.292 
E) 1.60

Question 16

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 17

A sample of H2 gas (12.28 g)occupies 100.0 L at 400.0 K and 2.00 atm.A sample weighing 9.49 g occupies ________ L at 353 K and 2.00 atm.

Accepted Answer

A) 109 
B) 68.2 
C) 54.7 
D) 147 
E) 77.3 
A) 109 
B) 68.2 
C) 54.7 
D) 147 
E) 77.3

Question 18

A sample of a gas originally at 29 °C and 1.25 atm pressure in a 3.0 L container is allowed to contract until the volume is 2.2 L and the temperature is 11 °C.The final pressure of the gas is ________ atm.

Accepted Answer

A) 2.9 
B) 2.8 
C) 1.6 
D) 2.1 
E) 0.38 
A) 2.9 
B) 2.8 
C) 1.6 
D) 2.1 
E) 0.38

Question 19

Of the following gases,________ will have the greatest rate of effusion at a given temperature.

Accepted Answer

A) NH3 
B) CH4 
C) Ar 
D) HBr 
E) HCl 
A) NH3 
B) CH4 
C) Ar 
D) HBr 
E) HCl

Question 20

A gas is considered "ideal" if one mole of it in a one-liter container exerts a pressure of exactly 1 atm at room temperature.

Accepted Answer

A) True 
 B)False

Exam 10: Gases

What volume (L)of fluorine gas is required to react with 2.31 g of calcium bromide to form calcium fluoride and bromine gas at 8.19 atm and 35.0 °C?

A sample of an ideal gas (3.00 L)in a closed container at 25.0 °C and 76.0 torr is heated to 270 °C.The pressure of the gas at this temperature is ________ torr.

A gas mixture of Xe,Ne,and Ar has a total pressure of 12.20 atm.What is the mole fraction of Xe if the partial pressures of Ne and Ar are 2.10 and 4.50 atm,respectively?

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

How many moles of an unknown gas are in a 325 mL container at a pressure of 695 torr and 19 °C?

What is the density of carbon dioxide gas (g/L)at 1106.2 mm Hg and 56.3 °C?

What is the molecular weight (g/mol)of an unknown gas that has a density of 3.59 g/L at STP?

The pressure exerted by a column of liquid is equal to the product of the height of the column times the gravitational constant times the density of the liquid, How high a column of methanol would be supported by a pressure that supports a 713 mm column of mercury

At STP,the density of ________ is 1.70 g/L.

The density of krypton gas at 0.866 atm and 44.4 °C is ________ g/L.

A sample of a gas (1.50 mol)is contained in a 15.0 L cylinder.The temperature is increased from 100 °C to 150 °C.The ratio of final pressure to initial pressure [ ] is ________.

The root-mean-square speed of CO at 113 °C is ________ m/s.

10.0 grams of argon and 20.0 grams of neon are placed in a 1216.1 ml container at 25.1 °C.The partial pressure of neon is ________ atm.

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

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

A sample of H2 gas (12.28 g)occupies 100.0 L at 400.0 K and 2.00 atm.A sample weighing 9.49 g occupies ________ L at 353 K and 2.00 atm.

A sample of a gas originally at 29 °C and 1.25 atm pressure in a 3.0 L container is allowed to contract until the volume is 2.2 L and the temperature is 11 °C.The final pressure of the gas is ________ atm.

Of the following gases,________ will have the greatest rate of effusion at a given temperature.

A gas is considered "ideal" if one mole of it in a one-liter container exerts a pressure of exactly 1 atm at room temperature.

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

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

A sample of H₂ gas (12.28 g)occupies 100.0 L at 400.0 K and 2.00 atm.A sample weighing 9.49 g occupies ________ L at 353 K and 2.00 atm.