Question 1

How many liters of oxygen gas at 153°C and 0.820 atm can be produced by the decomposition of 22.4 g of solid KClO3? (The other decomposition product is solid potassium chloride.)

Accepted Answer

A)  3.0 L
B)  0.085 L
C)  4.20 L
D)  7.79 L
E)  11.7 LF) A) and E)
G) C) and D)

Question 2

Calculate the molar mass of a gaseous substance if 0.125 g of the gas occupies 93.3 mL at STP.

Accepted Answer

The answer of Calculate the molar mass of a gaseous...

Question 3

A gas evolved during the fermentation of sugar was collected.After purification its volume was found to be 25.0 L at 22.5°C and 702 mmHg.How many moles of gas were collected?

Accepted Answer

A)  0.95 mol
B)  1.05 mol
C)  12.5 mol
D)  22.4 mol
E)  724 molF) C) and D)
G) B) and D)

Question 4

For a substance that remains a gas under the conditions listed, deviation from the ideal gas law would be most pronounced at

Accepted Answer

A)  100°C and 2.0 atm.
B)  0°C and 2.0 atm.
C)  -100°C and 2.0 atm.
D)  -100°C and 4.0 atm.
E)  100°C and 4.0 atm.F) A) and C)
G) B) and D)

Question 5

What volume of oxygen gas at 320 K and 680 torr will react completely with 2.50 L of NO gas at the same temperature and pressure? 2NO(g) + O2(g)  →\rarr→ 2NO2(g)

Accepted Answer

A)  1.25 L
B)  2.50 L
C)  3.00 L
D)  1.00 L
E)  5.00 L F) C) and E)
G) A) and D)

Question 6

A sample of mercury(II) oxide is placed in a 5.00 L evacuated container and heated until it decomposes entirely to mercury metal and oxygen gas. The container is then cooled to 25°C. One now finds that the gas pressure inside the container is 1.73 atm. What mass of mercury(II) oxide was originally placed into the container?

Accepted Answer

A)  913 g
B)  76.6 g
C)  1.51 g
D)  45.6 g
E)  153 gF) A) and D)
G) B) and E)

Question 7

How many liters of chlorine gas at 25°C and 0.950 atm can be produced by the reaction of 12.0 g of MnO2 with excess HCl(aq) according to the following chemical equation? MnO2(s) + 4HCl(aq)  →\rarr→ MnCl2(aq) + 2H2O(l) + Cl2(g)

Accepted Answer

A)  5.36 * 10-3 L
B)  0.138 L
C)  0.282 L
D)  3.09 L
E)  3.55 L F) C) and D)
G) A) and B)

Question 8

A 1.2 L flask contains 0.500 mole of ammonia (NH3) at 150°C. Calculate the pressure of the ammonia inside the flask.

Accepted Answer

A)  6.91 * 10-2 atm
B)  5.13 atm
C)  12.2 atm
D)  14.5 atm
E)  22.4 atmF) B) and C)
G) All of the above

Question 9

Calculate the density of Ar(g) at -11°C and 675 mmHg.

Accepted Answer

A)  1.52 g/L
B)  1.65 g/L
C)  -39.3 g/L
D)  39.95 g/L
E)  1254 g/LF) A) and B)
G) C) and E)

Question 10

Deviations from the ideal gas law are greater at

Accepted Answer

A)  low temperatures and low pressures.
B)  low temperatures and high pressures.
C)  high temperatures and high pressures.
D)  high temperatures and low pressures.E) None of the above
F) A) and B)

Question 11

Two moles of chlorine gas at 20.0°C are heated to 350°C while the volume is kept constant.The density of the gas

Accepted Answer

A)  increases.
B)  decreases.
C)  remains the same.
D)  Not enough information is given to correctly answer the question.E) A) and B)
F) B) and D)

Question 12

Give five examples of compounds that exist as gases at room temperature and pressure.

Accepted Answer

(Answers will vary.)...

Question 13

Calculate the density, in g/L, of CO2 gas at 27°C and 0.50 atm pressure.

Accepted Answer

A)  0.89 g/L
B)  1.12 g/L
C)  9.93 g/L
D)  46.0 g/L
E)  2.17 kg/LF) A) and E)
G) B) and E)

Question 14

If the pressure on a gas sample is tripled and the absolute temperature is quadrupled, by what factor will the volume of the sample change?

Accepted Answer

A)  12
B)  4/3
C)  3/4
D)  1/3
E)  4F) A) and B)
G) C) and E)

Question 15

Calculate the mass, in grams, of 2.74 L of CO gas measured at 33°C and 945 mmHg.

Accepted Answer

A)  0.263 g
B)  2.46 g
C)  3.80 g
D)  35.2 g
E)  206 gF) All of the above
G) A) and E)

Question 16

A sample of nitrogen gas has a volume of 32.4 L at 20°C. The gas is heated to 220ºC at constant pressure. What is the final volume of nitrogen?

Accepted Answer

A)  2.94 L
B)  19.3 L
C)  31.4 L
D)  54.5 L
E)  356 LF) D) and E)
G) B) and C)

Question 17

Which gas has molecules with the greatest average molecular speed at 25°C?

Accepted Answer

A)  CH4
B)  Kr
C)  N2
D)  CO2
E)  ArF) A) and C)
G) A) and D)

Question 18

Calculate the density of Br2(g) at 59.0°C and 1.00 atm pressure.

Accepted Answer

A)  27.2 g/L
B)  5.83 g/L
C)  769 g/L
D)  22.4 g/L
E)  3.45 g/LF) All of the above
G) A) and B)

Question 19

Today is a beautiful day for a picnic in the mountains, so we seal our peanut butter sandwich in a plastic sandwich bag at the base of the mountain.The approximate volume of the sandwich bag not occupied by the sandwich is 200.mL.The pressure at the base of the mountain is 1.0 atm.If the pressure at the top of the mountain is 0.80 atm, what is the final volume of gas in our sandwich bag?

Accepted Answer

The answer of Today is a beautiful day for a...

Question 20

Liquid nitrogen has a density of 0.807 g/mL at -195.8 °C.If 1.00 L of N2(l) is allowed to warm to 25°C at a pressure of 1.0 atm, what volume will the gas occupy? (R = 0.08206 L.atm/K.mol)

Accepted Answer

A)  59.1 L
B)  182 L
C)  705 L
D)  1.41 * 103 L
E)  1.97 * 104 LF) B) and D)
G) B) and C)

Exam 5: Gases

A 1.2 L flask contains 0.500 mole of ammonia (NH₃) at 150°C. Calculate the pressure of the ammonia inside the flask.

Correct Answer
verified

Which gas has molecules with the greatest average molecular speed at 25°C?

Correct Answer
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Deviations from the ideal gas law are greater at

Correct Answer
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Calculate the density, in g/L, of CO₂ gas at 27°C and 0.50 atm pressure.

Correct Answer
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Calculate the density of Br₂(g) at 59.0°C and 1.00 atm pressure.

Correct Answer
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Give five examples of compounds that exist as gases at room temperature and pressure.

Correct Answer
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(Answers will vary.)...
View Answer

Two moles of chlorine gas at 20.0°C are heated to 350°C while the volume is kept constant.The density of the gas

Correct Answer
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Correct Answer
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Calculate the mass, in grams, of 2.74 L of CO gas measured at 33°C and 945 mmHg.

Correct Answer
verified

A gas evolved during the fermentation of sugar was collected.After purification its volume was found to be 25.0 L at 22.5°C and 702 mmHg.How many moles of gas were collected?

Correct Answer
verified

Calculate the density of Ar(g) at -11°C and 675 mmHg.

Correct Answer
verified

How many liters of chlorine gas at 25°C and 0.950 atm can be produced by the reaction of 12.0 g of MnO₂ with excess HCl(aq) according to the following chemical equation? MnO₂(s) + 4HCl(aq) $\rarr$ MnCl₂(aq) + 2H₂O(l) + Cl₂(g)

Correct Answer
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Correct Answer
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A sample of nitrogen gas has a volume of 32.4 L at 20°C. The gas is heated to 220ºC at constant pressure. What is the final volume of nitrogen?

Correct Answer
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How many liters of oxygen gas at 153°C and 0.820 atm can be produced by the decomposition of 22.4 g of solid KClO₃? (The other decomposition product is solid potassium chloride.)

Correct Answer
verified

Calculate the molar mass of a gaseous substance if 0.125 g of the gas occupies 93.3 mL at STP.

Correct Answer
verified

Liquid nitrogen has a density of 0.807 g/mL at -195.8 °C.If 1.00 L of N₂(l) is allowed to warm to 25°C at a pressure of 1.0 atm, what volume will the gas occupy? (R = 0.08206 L.atm/K.mol)

Correct Answer
verified

For a substance that remains a gas under the conditions listed, deviation from the ideal gas law would be most pronounced at

Correct Answer
verified

What volume of oxygen gas at 320 K and 680 torr will react completely with 2.50 L of NO gas at the same temperature and pressure? 2NO(g) + O₂(g) $\rarr$ 2NO₂(g)

Correct Answer
verified

If the pressure on a gas sample is tripled and the absolute temperature is quadrupled, by what factor will the volume of the sample change?

Correct Answer
verified

Exam 5: Gases

A 1.2 L flask contains 0.500 mole of ammonia (NH3) at 150°C. Calculate the pressure of the ammonia inside the flask.

Correct AnswerverifiedShow Answer

Which gas has molecules with the greatest average molecular speed at 25°C?

Correct AnswerverifiedShow Answer

Deviations from the ideal gas law are greater at

Correct AnswerverifiedShow Answer

Calculate the density, in g/L, of CO2 gas at 27°C and 0.50 atm pressure.

Correct AnswerverifiedShow Answer

Calculate the density of Br2(g) at 59.0°C and 1.00 atm pressure.

Correct AnswerverifiedShow Answer

Give five examples of compounds that exist as gases at room temperature and pressure.

Correct Answerverified(Answers will vary.)...View AnswerShow Answer

Two moles of chlorine gas at 20.0°C are heated to 350°C while the volume is kept constant.The density of the gas

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

Calculate the mass, in grams, of 2.74 L of CO gas measured at 33°C and 945 mmHg.

Correct AnswerverifiedShow Answer

A gas evolved during the fermentation of sugar was collected.After purification its volume was found to be 25.0 L at 22.5°C and 702 mmHg.How many moles of gas were collected?

Correct AnswerverifiedShow Answer

Calculate the density of Ar(g) at -11°C and 675 mmHg.

Correct AnswerverifiedShow Answer

How many liters of chlorine gas at 25°C and 0.950 atm can be produced by the reaction of 12.0 g of MnO2 with excess HCl(aq) according to the following chemical equation? MnO2(s) + 4HCl(aq) →\rarr→ MnCl2(aq) + 2H2O(l) + Cl2(g)

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

A sample of nitrogen gas has a volume of 32.4 L at 20°C. The gas is heated to 220ºC at constant pressure. What is the final volume of nitrogen?

Correct AnswerverifiedShow Answer

How many liters of oxygen gas at 153°C and 0.820 atm can be produced by the decomposition of 22.4 g of solid KClO3? (The other decomposition product is solid potassium chloride.)

Correct AnswerverifiedShow Answer

Calculate the molar mass of a gaseous substance if 0.125 g of the gas occupies 93.3 mL at STP.

Correct AnswerverifiedShow Answer

Liquid nitrogen has a density of 0.807 g/mL at -195.8 °C.If 1.00 L of N2(l) is allowed to warm to 25°C at a pressure of 1.0 atm, what volume will the gas occupy? (R = 0.08206 L.atm/K.mol)

Correct AnswerverifiedShow Answer

For a substance that remains a gas under the conditions listed, deviation from the ideal gas law would be most pronounced at

Correct AnswerverifiedShow Answer

What volume of oxygen gas at 320 K and 680 torr will react completely with 2.50 L of NO gas at the same temperature and pressure? 2NO(g) + O2(g) →\rarr→ 2NO2(g)

Correct AnswerverifiedShow Answer

If the pressure on a gas sample is tripled and the absolute temperature is quadrupled, by what factor will the volume of the sample change?

Correct AnswerverifiedShow Answer

A 1.2 L flask contains 0.500 mole of ammonia (NH₃) at 150°C. Calculate the pressure of the ammonia inside the flask.

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Calculate the density, in g/L, of CO₂ gas at 27°C and 0.50 atm pressure.

Correct Answer
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Calculate the density of Br₂(g) at 59.0°C and 1.00 atm pressure.

Correct Answer
verified

Correct Answer
verified
(Answers will vary.)...
View Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
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Correct Answer
verified

Correct Answer
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How many liters of chlorine gas at 25°C and 0.950 atm can be produced by the reaction of 12.0 g of MnO₂ with excess HCl(aq) according to the following chemical equation? MnO₂(s) + 4HCl(aq) $\rarr$ MnCl₂(aq) + 2H₂O(l) + Cl₂(g)

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

How many liters of oxygen gas at 153°C and 0.820 atm can be produced by the decomposition of 22.4 g of solid KClO₃? (The other decomposition product is solid potassium chloride.)

Correct Answer
verified

Correct Answer
verified

Liquid nitrogen has a density of 0.807 g/mL at -195.8 °C.If 1.00 L of N₂(l) is allowed to warm to 25°C at a pressure of 1.0 atm, what volume will the gas occupy? (R = 0.08206 L.atm/K.mol)

Correct Answer
verified

Correct Answer
verified

What volume of oxygen gas at 320 K and 680 torr will react completely with 2.50 L of NO gas at the same temperature and pressure? 2NO(g) + O₂(g) $\rarr$ 2NO₂(g)

Correct Answer
verified

Correct Answer
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