Question 1

The volume of a gas is proportional to number of moles of a gas.What is this known as?

Accepted Answer

A) Avogadro's law 
B) Ideal gas law 
C) Charles's law 
D) Boyle's law 
E) Dalton's law 
A) Avogadro's law 
B) Ideal gas law 
C) Charles's law 
D) Boyle's law 
E) Dalton's law

Question 2

Convert 717.28 mmHg to bar.

Accepted Answer

A) 1.046 bar 
B) 0.9438 bar 
C) 1.060 bar 
D) 0.9563 bar 
E) 0.8971 bar 
A) 1.046 bar 
B) 0.9438 bar 
C) 1.060 bar 
D) 0.9563 bar 
E) 0.8971 bar

Question 3

A mixture of 10.0 g of Ne and 10.0 g Ar have a total pressure of 1.6 bar.What is the partial pressure of Ne?

Accepted Answer

A) 1.1 bar 
B) 0.80 bar 
C) 0.54 bar 
D) 0.40 bar 
E) 1.3 bar 
A) 1.1 bar 
B) 0.80 bar 
C) 0.54 bar 
D) 0.40 bar 
E) 1.3 bar

Question 4

In a container containing CO,H2,and O2,what is the mole fraction of CO if the H2 mole fraction is 0.22 and the O2 mole fraction is 0.58?

Accepted Answer

A) 0.20 
B) 0.30 
C) 0.10 
D) 0.50 
A) 0.20 
B) 0.30 
C) 0.10 
D) 0.50

Question 5

What is the average speed (actually the root mean square speed)of a neon atom at 27 °C?

Accepted Answer

A) 5.78 m s-1 
B) 19.3 m s-1 
C) 183 m s-1 
D) 609 m s-1 
A) 5.78 m s-1 
B) 19.3 m s-1 
C) 183 m s-1 
D) 609 m s-1

Question 6

Identify the gas that is the lowest percent by volume in dry air.

Accepted Answer

A) CO2 
B) Ar 
C) O2 
D) N2 
A) CO2 
B) Ar 
C) O2 
D) N2

Question 7

This equation is used to calculate the properties of a gas under nonideal conditions.

Accepted Answer

A) Charles's law 
B) Avogadro's law 
C) Boyle's law 
D) van der Waals equation 
E) Dalton's law 
A) Charles's law 
B) Avogadro's law 
C) Boyle's law 
D) van der Waals equation 
E) Dalton's law

Question 8

A mixture of 0.220 moles CO,0.350 moles H2,and 0.640 moles He has a total pressure of 2.95 bar.What is the pressure of CO?

Accepted Answer

A) 1.86 bar 
B) 0.649 bar 
C) 0.536 bar 
D) 1.54 bar 
E) 0.955 bar 
A) 1.86 bar 
B) 0.649 bar 
C) 0.536 bar 
D) 1.54 bar 
E) 0.955 bar

Question 9

Three identical flasks contain three different gases at standard temperature and pressure.Flask A contains $\mathrm { C } _ { 2 } \mathrm { H } _ { 4 }$ flask B contains O3,and flask C contains F2.Which flask contains the largest number of molecules?

Accepted Answer

A) flask A 
B) flask B 
C) flask C 
D) All contain the same number of molecules. 
A) flask A 
B) flask B 
C) flask C 
D) All contain the same number of molecules.

Question 10

Determine the density of $\mathrm { CO } _ { 2 }$ gas at 278 K and 1.00 bar.

Accepted Answer

A) 1.14 g $\mathrm { L } ^ { - 1 }$ 
B) 2.37 g $\mathrm { L } ^ { - 1 }$ 
C) 1.90 g $\mathrm { L } ^ { - 1 }$ 
D) 3.08 g $\mathrm { L } ^ { - 1 }$ 
E) 2.11 g $\mathrm { L } ^ { - 1 }$ 
A) 1.14 g $\mathrm { L } ^ { - 1 }$ 
B) 2.37 g $\mathrm { L } ^ { - 1 }$ 
C) 1.90 g $\mathrm { L } ^ { - 1 }$ 
D) 3.08 g $\mathrm { L } ^ { - 1 }$ 
E) 2.11 g $\mathrm { L } ^ { - 1 }$

Question 11

Which of the following samples will have the lowest pressure if they are all at the same temperature and in identical containers (same volume)?

Accepted Answer

A) 15 g F2 
B) 15 g Ne 
C) 15 g Kr 
D) 15 g CO2 
E) All of these samples will have the same pressure. 
A) 15 g F2 
B) 15 g Ne 
C) 15 g Kr 
D) 15 g CO2 
E) All of these samples will have the same pressure.

Question 12

A gas is at 35.0 °C and 4.50 L.What is the temperature at 9.00 L?

Accepted Answer

A) 343°C 
B) 70.0°C 
C) 616°C 
D) 1.16°C 
E) 17.5°C 
A) 343°C 
B) 70.0°C 
C) 616°C 
D) 1.16°C 
E) 17.5°C

Question 13

A 0.465 g sample of an unknown compound occupies 245 mL at 298 K and 1.24 bar.What is the molar mass of the unknown compound?

Accepted Answer

A) 26.3 g $\mathrm { mol } ^ { - 1 }$ 
B) 33.9 g $\mathrm { mol } ^ { - 1 }$ 
C) 12.2 g $\mathrm { mol } ^ { - 1 }$ 
D) 37.9 g $\mathrm { mol } ^ { - 1 }$ 
E) 81.8 g $\mathrm { mol } ^ { - 1 }$ 
A) 26.3 g $\mathrm { mol } ^ { - 1 }$ 
B) 33.9 g $\mathrm { mol } ^ { - 1 }$ 
C) 12.2 g $\mathrm { mol } ^ { - 1 }$ 
D) 37.9 g $\mathrm { mol } ^ { - 1 }$ 
E) 81.8 g $\mathrm { mol } ^ { - 1 }$

Question 14

A 0.286 g sample of gas occupies 125 mL at 0.7985 bar and 25 °C.What is the molar mass of the gas?

Accepted Answer

A) 5.9 g mol-1 
B) 44 g mol-1 
C) 59 g mol-1 
D) 71 g mol-1 
A) 5.9 g mol-1 
B) 44 g mol-1 
C) 59 g mol-1 
D) 71 g mol-1

Question 15

The atmospheric pressure is 715 mmHg.What is the pressure in bar?

Accepted Answer

A) 1.10 bar 
B) 0.940 bar 
C) 1.08 bar 
D) 0.953 bar 
E) 0.919 bar 
A) 1.10 bar 
B) 0.940 bar 
C) 1.08 bar 
D) 0.953 bar 
E) 0.919 bar

Question 16

The volume of a gas is proportional to the temperature of a gas.What is this known as?

Accepted Answer

A) Avogadro's law 
B) Ideal gas law 
C) Charles's law 
D) Boyle's law 
E) Dalton's law 
A) Avogadro's law 
B) Ideal gas law 
C) Charles's law 
D) Boyle's law 
E) Dalton's law

Question 17

Convert 1.25 atm to bar.

Accepted Answer

A) 1.23 bar 
B) 0.975 bar 
C) 1.27 bar 
D) 0.7874 bar 
E) 1.25 bar 
A) 1.23 bar 
B) 0.975 bar 
C) 1.27 bar 
D) 0.7874 bar 
E) 1.25 bar

Question 18

What is the volume of 9.783 × 1023 atoms of He at 9.25 bar and 512 K?

Accepted Answer

A) 7.48 L 
B) 3.69 L 
C) 1.85 L 
D) 15.4 L 
E) 30.8 L 
A) 7.48 L 
B) 3.69 L 
C) 1.85 L 
D) 15.4 L 
E) 30.8 L

Question 19

Place the following gases in order of increasing density at STP. 
N2 NH3 N2O4 Ar

Accepted Answer

A) N2O4 2 3 
B) Ar 2O4 2 3 
C) N2 2O4 3 
D) NH3 2 2O4 
E) Ar 2 3 2O4 
A) N2O4 2 3 
B) Ar 2O4 2 3 
C) N2 2O4 3 
D) NH3 2 2O4 
E) Ar 2 3 2O4

Question 20

What is the temperature of SO2 gas if the average speed (actually the root mean square speed)of the molecules is 750 m s-1?

Accepted Answer

A) 1.92 K 
B) 1.44 × 103 K 
C) 1.92 × 103 K 
D) 1.44 × 106 K 
A) 1.92 K 
B) 1.44 × 103 K 
C) 1.92 × 103 K 
D) 1.44 × 106 K

Exam 5: Gases

The volume of a gas is proportional to number of moles of a gas.What is this known as?

Convert 717.28 mmHg to bar.

A mixture of 10.0 g of Ne and 10.0 g Ar have a total pressure of 1.6 bar.What is the partial pressure of Ne?

In a container containing CO,H2,and O2,what is the mole fraction of CO if the H2 mole fraction is 0.22 and the O2 mole fraction is 0.58?

What is the average speed (actually the root mean square speed)of a neon atom at 27 °C?

Identify the gas that is the lowest percent by volume in dry air.

This equation is used to calculate the properties of a gas under nonideal conditions.

A mixture of 0.220 moles CO,0.350 moles H2,and 0.640 moles He has a total pressure of 2.95 bar.What is the pressure of CO?

Three identical flasks contain three different gases at standard temperature and pressure.Flask A contains C2H4\mathrm { C } _ { 2 } \mathrm { H } _ { 4 }C2​H4​ flask B contains O3,and flask C contains F2.Which flask contains the largest number of molecules?

Determine the density of CO2\mathrm { CO } _ { 2 }CO2​ gas at 278 K and 1.00 bar.

Which of the following samples will have the lowest pressure if they are all at the same temperature and in identical containers (same volume)?

A gas is at 35.0 °C and 4.50 L.What is the temperature at 9.00 L?

A 0.465 g sample of an unknown compound occupies 245 mL at 298 K and 1.24 bar.What is the molar mass of the unknown compound?

A 0.286 g sample of gas occupies 125 mL at 0.7985 bar and 25 °C.What is the molar mass of the gas?

The atmospheric pressure is 715 mmHg.What is the pressure in bar?

The volume of a gas is proportional to the temperature of a gas.What is this known as?

Convert 1.25 atm to bar.

What is the volume of 9.783 × 1023 atoms of He at 9.25 bar and 512 K?

Place the following gases in order of increasing density at STP. N2 NH3 N2O4 Ar

What is the temperature of SO2 gas if the average speed (actually the root mean square speed)of the molecules is 750 m s-1?

Units of Measurement for Physical and Chemical Change

Atoms and Elements

Molecules,compounds,and Nomenclature

Chemical Reactions and Stoichiometry

Thermochemistry

The Quantum-Mechanical Model of the Atom

Periodic Properties of the Elements

Chemical Bonding I: Lewis Theory

Chemical Bonding II: Molecular Shapes, valence Bond Theory, and Molecular Orbital Theory

Liquids, solids, and Intermolecular Forces

Solutions

Chemical Kinetics

Chemical Equilibrium

Acids and Bases

Aqueous Ionic Equilibrium

Gibbs Energy and Thermodynamics

Electrochemistry

Radioactivity and Nuclear Chemistry

Organic Chemistry I: Structures

Organic Chemistry II: Reactions

Biochemistry

Chemistry of the Nonmetals

Metals and Metallurgy

Transition Metals and Coordination Compounds

Filters

In a container containing CO,H₂,and O₂,what is the mole fraction of CO if the H₂ mole fraction is 0.22 and the O₂ mole fraction is 0.58?

A mixture of 0.220 moles CO,0.350 moles H₂,and 0.640 moles He has a total pressure of 2.95 bar.What is the pressure of CO?

Three identical flasks contain three different gases at standard temperature and pressure.Flask A contains $\mathrm { C } _ { 2 } \mathrm { H } _ { 4 }$ flask B contains O₃,and flask C contains F₂.Which flask contains the largest number of molecules?

Determine the density of $\mathrm { CO } _ { 2 }$ gas at 278 K and 1.00 bar.

What is the volume of 9.783 × 10²³ atoms of He at 9.25 bar and 512 K?

Place the following gases in order of increasing density at STP. N₂ NH₃ N₂O₄ Ar

What is the temperature of SO₂ gas if the average speed (actually the root mean square speed)of the molecules is 750 m s^-1?