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)  O3F) B) and D)
G) D) and E)

Question 2

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

Accepted Answer

A)  Cl2
B)  NH3
C)  O2
D)  Ne E) A) and D)
F) A) and C)

Question 3

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 barF) B) and D)
G) A) and E)

Question 4

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-1E) A) and B)
F) B) and C)

Question 5

What is the lowest layer of the atmosphere?

Accepted Answer

A)  stratosphere
B)  mesosphere
C)  nanosphere
D)  troposphere
E)  thermosphereF) B) and E)
G) A) and B)

Question 6

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 lawF) B) and C)
G) B) and E)

Question 7

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 LE) A) and B)
F) A) and C)

Question 8

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 LF) A) and B)
G) None of the above

Question 9

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)  O3F) A) and E)
G) B) and E)

Question 10

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 11

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 °CE) A) and C)
F) B) and D)

Question 12

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

Accepted Answer

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

Question 13

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 mmHgE) All of the above
F) None of the above

Question 14

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 KF) A) and E)
G) C) and D)

Question 15

Identify the gas particle that travels the slowest.

Accepted Answer

A)  H2
B)  O2
C)  Ne
D)  N2
E)  COF) B) and D)
G) A) and B)

Question 16

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)  F2F) B) and E)
G) A) and B)

Question 17

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 molF) A) and B)
G) B) and E)

Question 18

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 LF) A) and D)
G) None of the above

Question 19

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 KF) B) and E)
G) B) and C)

Question 20

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 barF) B) and D)
G) A) and C)

Exam 5: Gases

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

Correct AnswerverifiedShow Answer

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

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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?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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)

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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?

Correct AnswerverifiedShow Answer

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?

Correct AnswerverifiedShow Answer

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.

Correct AnswerverifiedThe pressure would stay constant.The dou...View AnswerShow Answer

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?

Correct AnswerverifiedShow Answer

Identify the gas particle that travels the slowest.

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

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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?

Correct AnswerverifiedShow Answer

What is the lowest layer of the atmosphere?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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?

Correct AnswerverifiedShow Answer

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

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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)

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The pressure would stay constant.The dou...
View Answer

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

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

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

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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?

Correct Answer
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