Question 1

Which of the following gases has the highest root mean square velocity at constant temperature? NH3 CO2 NO2 F2 O3

Accepted Answer

A) NH3 
B) CO2 
C) NO2 
D) F2 
E) O3 
A) NH3 
B) CO2 
C) NO2 
D) F2 
E) O3

Question 2

What volume would 1.02 moles of Kr occupy at a pressure of 1.65 bar and a temperature of 281.2 K?

Accepted Answer

A) 28.7 L 
B) 14.5 L 
C) 12.7 L 
D) 6.87 L 
E) 16.9 L 
A) 28.7 L 
B) 14.5 L 
C) 12.7 L 
D) 6.87 L 
E) 16.9 L

Question 3

Determine the density of $\mathrm { NH } _ { 3 }$ gas at 435 K and 1.00 bar.

Accepted Answer

A) 2.10 g $\mathrm { L } ^ { - 1 }$ 
B) 0.471 g $\mathrm { L } ^ { - 1 }$ 
C) 0.321 g $\mathrm { L } ^ { - 1 }$ 
D) 2.24 g $\mathrm { L } ^ { - 1 }$ 
E) 0.851 g $\mathrm { L } ^ { - 1 }$ 
A) 2.10 g $\mathrm { L } ^ { - 1 }$ 
B) 0.471 g $\mathrm { L } ^ { - 1 }$ 
C) 0.321 g $\mathrm { L } ^ { - 1 }$ 
D) 2.24 g $\mathrm { L } ^ { - 1 }$ 
E) 0.851 g $\mathrm { L } ^ { - 1 }$

Question 4

Which of the following gases has the lowest root mean square velocity at constant temperature? NH3 CO2 NO2 F2 O3

Accepted Answer

A) NH3 
B) CO2 
C) NO2 
D) F2 
E) O3 
A) NH3 
B) CO2 
C) NO2 
D) F2 
E) O3

Question 5

Determine the volume of H2S (at 375 K and 1.216 bar)needed to produce 55.0 g of S.Assume that there is excess SO2 present. 2H2S(g)+ SO2(g)→ 3S(s)+ 2H2O(g)

Accepted Answer

A) 44.0 L 
B) 29.3 L 
C) 22.7 L 
D) 34.1 L 
E) 66.0 L 
A) 44.0 L 
B) 29.3 L 
C) 22.7 L 
D) 34.1 L 
E) 66.0 L

Question 6

What is the pressure in a gas container that is connected to an open-end U-tube manometer if the pressure of the atmosphere is 742 Torr and the level of mercury in the arm connected to the container is 8.60 cm higher than the level of mercury open to the atmosphere?

Accepted Answer

A) 656 mmHg 
B) 733 mmHg 
C) 751 mmHg 
D) 828 mmHg 
A) 656 mmHg 
B) 733 mmHg 
C) 751 mmHg 
D) 828 mmHg

Question 7

A mixture of N2,O2,and Ar has mole fractions of 0.25,0.65,and 0.10,respectively.What is the pressure of N2 if the total pressure of the mixture is 3.9 bar?

Accepted Answer

A) 2.5 bar 
B) 0.39 bar 
C) 0.67 bar 
D) 0.98 bar 
E) 1.33 bar 
A) 2.5 bar 
B) 0.39 bar 
C) 0.67 bar 
D) 0.98 bar 
E) 1.33 bar

Question 8

Consider a container of gas under a particular P,V,T set of conditions.Describe how the pressure would change if the volume were doubled while the absolute temperature was increasing by a factor of 2.

Accepted Answer

The pressure would stay constant.The dou

Question 9

Which of the following compounds will behave least like an ideal gas at low temperatures?

Accepted Answer

A) He 
B) SO2 
C) H2 
D) N2 
E) F2 
A) He 
B) SO2 
C) H2 
D) N2 
E) F2

Question 10

Identify the gas particle that travels the slowest.

Accepted Answer

A) H2 
B) O2 
C) Ne 
D) N2 
E) CO 
A) H2 
B) O2 
C) Ne 
D) N2 
E) CO

Question 11

The density of a gas is 1.41 g $\mathrm { L } ^ { - 1 }$ at STP.What is the gas?

Accepted Answer

A) Cl2 
B) NH3 
C) O2 
D) Ne 
A) Cl2 
B) NH3 
C) O2 
D) Ne

Question 12

Calculate the root mean square velocity of nitrogen molecules at 25 °C.

Accepted Answer

A) 729 m s-1 
B) 515 m s-1 
C) 149 m s-1 
D) 297 m s-1 
A) 729 m s-1 
B) 515 m s-1 
C) 149 m s-1 
D) 297 m s-1

Question 13

Calculate the temperature if 3.120 moles of He has a pressure of 2.45 bar in a 23.8 L container.

Accepted Answer

A) 218 K 
B) 314 K 
C) 225 K 
D) 334 K 
E) 287 K 
A) 218 K 
B) 314 K 
C) 225 K 
D) 334 K 
E) 287 K

Question 14

A syringe initially holds a sample of gas with a volume of 285 mL at 355 K and 1.88 bar.To what temperature must the gas in the syringe be heated/cooled to have a volume of 435 mL at 2.50 bar?

Accepted Answer

A) 139 K 
B) 572 K 
C) 175 K 
D) 466 K 
E) 721 K 
A) 139 K 
B) 572 K 
C) 175 K 
D) 466 K 
E) 721 K

Question 15

What pressure will 14.0 g of CO exert in a 3.5 L container at 75 °C?

Accepted Answer

A) 4.1 bar 
B) 5.0 bar 
C) 6.4 bar 
D) 1.1 bar 
E) 2.3 bar 
A) 4.1 bar 
B) 5.0 bar 
C) 6.4 bar 
D) 1.1 bar 
E) 2.3 bar

Question 16

The volume of a gas is inversely proportional to the pressure 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

What is the lowest layer of the atmosphere?

Accepted Answer

A) stratosphere 
B) mesosphere 
C) nanosphere 
D) troposphere 
E) thermosphere 
A) stratosphere 
B) mesosphere 
C) nanosphere 
D) troposphere 
E) thermosphere

Question 18

A balloon filled with helium gas at 20 °C occupies 4.91 L at 1.00 atm.The balloon is immersed in liquid nitrogen at -196 °C,while the pressure is raised to 5.20 atm.What is the volume of the balloon in the liquid nitrogen?

Accepted Answer

A) 0.25 L 
B) 3.6 L 
C) 6.7 L 
D) 97 L 
A) 0.25 L 
B) 3.6 L 
C) 6.7 L 
D) 97 L

Question 19

How many moles of molecular oxygen are required to produce a pressure of 0.413 bar in a 650 mL container with a temperature of 245 K?

Accepted Answer

A) 0.0132 mol 
B) 0.199 mol 
C) 0.00872 mol 
D) 0.00971 mol 
E) 0.0245 mol 
A) 0.0132 mol 
B) 0.199 mol 
C) 0.00872 mol 
D) 0.00971 mol 
E) 0.0245 mol

Question 20

The volume of 350.mL of gas at 25 °C is decreased to 135 mL at constant pressure.What is the final temperature of the gas?

Accepted Answer

A) -158 °C 
B) 9.6 °C 
C) 65 °C 
D) 500 °C 
A) -158 °C 
B) 9.6 °C 
C) 65 °C 
D) 500 °C

Exam 5: Gases

Which of the following gases has the highest root mean square velocity at constant temperature? NH3 CO2 NO2 F2 O3

What volume would 1.02 moles of Kr occupy at a pressure of 1.65 bar and a temperature of 281.2 K?

Determine the density of NH3\mathrm { NH } _ { 3 }NH3​ gas at 435 K and 1.00 bar.

Which of the following gases has the lowest root mean square velocity at constant temperature? NH3 CO2 NO2 F2 O3

Determine the volume of H2S (at 375 K and 1.216 bar)needed to produce 55.0 g of S.Assume that there is excess SO2 present. 2H2S(g)+ SO2(g)→ 3S(s)+ 2H2O(g)

What is the pressure in a gas container that is connected to an open-end U-tube manometer if the pressure of the atmosphere is 742 Torr and the level of mercury in the arm connected to the container is 8.60 cm higher than the level of mercury open to the atmosphere?

A mixture of N2,O2,and Ar has mole fractions of 0.25,0.65,and 0.10,respectively.What is the pressure of N2 if the total pressure of the mixture is 3.9 bar?

Consider a container of gas under a particular P,V,T set of conditions.Describe how the pressure would change if the volume were doubled while the absolute temperature was increasing by a factor of 2.

Which of the following compounds will behave least like an ideal gas at low temperatures?

Identify the gas particle that travels the slowest.

The density of a gas is 1.41 g L−1\mathrm { L } ^ { - 1 }L−1 at STP.What is the gas?

Calculate the root mean square velocity of nitrogen molecules at 25 °C.

Calculate the temperature if 3.120 moles of He has a pressure of 2.45 bar in a 23.8 L container.

A syringe initially holds a sample of gas with a volume of 285 mL at 355 K and 1.88 bar.To what temperature must the gas in the syringe be heated/cooled to have a volume of 435 mL at 2.50 bar?

What pressure will 14.0 g of CO exert in a 3.5 L container at 75 °C?

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

What is the lowest layer of the atmosphere?

A balloon filled with helium gas at 20 °C occupies 4.91 L at 1.00 atm.The balloon is immersed in liquid nitrogen at -196 °C,while the pressure is raised to 5.20 atm.What is the volume of the balloon in the liquid nitrogen?

How many moles of molecular oxygen are required to produce a pressure of 0.413 bar in a 650 mL container with a temperature of 245 K?

The volume of 350.mL of gas at 25 °C is decreased to 135 mL at constant pressure.What is the final temperature of the gas?

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

Which of the following gases has the highest root mean square velocity at constant temperature? NH₃ CO₂ NO₂ F₂ O₃

Determine the density of $\mathrm { NH } _ { 3 }$ gas at 435 K and 1.00 bar.

Which of the following gases has the lowest root mean square velocity at constant temperature? NH₃ CO₂ NO₂ F₂ O₃

Determine the volume of H₂S (at 375 K and 1.216 bar)needed to produce 55.0 g of S.Assume that there is excess SO₂ present. 2H₂S(g)+ SO₂(g)→ 3S(s)+ 2H₂O(g)

A mixture of N₂,O₂,and Ar has mole fractions of 0.25,0.65,and 0.10,respectively.What is the pressure of N₂ if the total pressure of the mixture is 3.9 bar?

The density of a gas is 1.41 g $\mathrm { L } ^ { - 1 }$ at STP.What is the gas?