Question 1

If equal masses of O2(g) and HBr(g) are in separate containers of equal volume and temperature, which one of these statements is true?

Accepted Answer

A)  The pressure in the O2 container is greater than that in the HBr container.
B)  There are more HBr molecules than O2 molecules.
C)  The average velocity of the O2 molecules is less than that of the HBr molecules.
D)  The average kinetic energy of HBr molecules is greater than that of O2 molecules.
E)  The pressures of both gases are the same.F) B) and E)
G) A) and E)

Question 2

A 1.17 g sample of an alkane hydrocarbon gas occupies a volume of 674 mL at 28°C and 741 mmHg. Alkanes are known to have the general formula CnH2n+2. What is the molecular formula of the gas in this sample? (R = 0.08206 L.atm/K.mol)

Accepted Answer

A)  CH4
B)  C2H6
C)  C3H8
D)  C4H10
E)  C5H12F) A) and C)
G) C) and D)

Question 3

Determine the pressure of the gas trapped in the apparatus shown below when the atmospheric pressure is 695 mmHg.

Accepted Answer

A)  45 mmHg
B)  650 mmHg
C)  695 mmHg
D)  740 mmHg
E)  760 mmHgF) D) and E)
G) None of the above

Question 4

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) A) and D)
G) A) and C)

Question 5

What volume of H2 is formed at STP when 6.0 g of Al is treated with excess NaOH?
2NaOH + 2Al + 6H2O $\rarr$ 2NaAl(OH)4 + 3H2(g)

Accepted Answer

The answer of What volume of H2 is formed at...

Question 6

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) All of the above
G) A) and C)

Question 7

Packaged cake mixes usually contain baking powder, a mixture of sodium hydrogen carbonate and calcium hydrogen phosphate that react to produce carbon dioxide gas when they are heated in water. The CO2(g)formed allows the cake to "rise." When such cake mixes are used at high altitudes, often the cake will rise too much and collapse, unless special instructions are followed. Why does this happen?

Accepted Answer

Due to the reduced a...

Question 8

What is the pressure of the sample of gas trapped in the open-tube mercury manometer shown below if atmospheric pressure is 742 mmHg and h = 16.7 cm?

Accepted Answer

The answer of What is the pressure of the sample...

Question 9

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

Question 10

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

Question 11

A 2.50-L flask contains a mixture of methane (CH4) and propane (C3H8) at a pressure of 1.45 atm and 20°C. When this gas mixture is then burned in excess oxygen, 8.60 g of carbon dioxide is formed. (The other product is water.) What is the mole fraction of methane in the original gas mixture?

Accepted Answer

A)  0.341
B)  1.00
C)  0.659
D)  0.855
E)  0.145F) C) and D)
G) A) and E)

Question 12

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) C) and D)
G) B) and D)

Question 13

At what temperature will a fixed mass of gas with a volume of 125 L at 15°C and 750 mmHg occupy a volume of 101 L at a pressure of 645 mm Hg?

Accepted Answer

A)  -73°C
B)  10.4°C
C)  2°C
D)  34°C
E)  200°CF) B) and E)
G) A) and B)

Question 14

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) All of the above
F) B) and D)

Question 15

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) A) and B)
G) B) and D)

Question 16

What is P in the table below?

Accepted Answer

The answer of What is P in the table below?...

Question 17

What is P in the table below?

Accepted Answer

The answer of What is P in the table below?...

Question 18

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 B)
G) A) and C)

Question 19

What is the pressure (in atmospheres)of the sample of gas trapped in the closed-tube mercury manometer shown below if h = 23.6 cm?

Accepted Answer

The answer of What is the pressure (in atmospheres)of the...

Question 20

In an effort to address concerns about global warming, a power plant in Portland, Oregon is designed to take all of its exhaust gases from its boilers and recycle the CO2 using the Solvay process to make sodium hydrogen carbonate. The reaction is shown below.
NH3(g)+ H2O(l)+ CO2(g)+ NaCl(aq)$\rarr$NaHCO3(aq)+ NH4Cl(aq)
How many liters each of NH3 and CO2 (both at STP)would be consumed to produce 3.00 kg of sodium bicarbonate?

Accepted Answer

The volume of both N...

Exam 5: Gases

If equal masses of O₂(g) and HBr(g) are in separate containers of equal volume and temperature, which one of these statements is true?

Correct Answer
verified

What is the pressure of the sample of gas trapped in the open-tube mercury manometer shown below if atmospheric pressure is 742 mmHg and h = 16.7 cm?

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

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

Correct Answer
verified

What is P in the table below?

Correct Answer
verified

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
verified

Determine the pressure of the gas trapped in the apparatus shown below when the atmospheric pressure is 695 mmHg.

Correct Answer
verified

What is the pressure (in atmospheres)of the sample of gas trapped in the closed-tube mercury manometer shown below if h = 23.6 cm?

Correct Answer
verified

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

Correct Answer
verified

What is P in the table below?

Correct Answer
verified

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

Correct Answer
verified

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
verified

Correct Answer
verified
Due to the reduced a...
View Answer

A 2.50-L flask contains a mixture of methane (CH₄) and propane (C₃H₈) at a pressure of 1.45 atm and 20°C. When this gas mixture is then burned in excess oxygen, 8.60 g of carbon dioxide is formed. (The other product is water.) What is the mole fraction of methane in the original gas mixture?

Correct Answer
verified

Correct Answer
verified
The volume of both N...
View Answer

What volume of H₂ is formed at STP when 6.0 g of Al is treated with excess NaOH? 2NaOH + 2Al + 6H₂O $\rarr$ 2NaAl(OH)₄ + 3H₂(g)

Correct Answer
verified

A 1.17 g sample of an alkane hydrocarbon gas occupies a volume of 674 mL at 28°C and 741 mmHg. Alkanes are known to have the general formula CnH2n+2. What is the molecular formula of the gas in this sample? (R = 0.08206 L.atm/K.mol)

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

At what temperature will a fixed mass of gas with a volume of 125 L at 15°C and 750 mmHg occupy a volume of 101 L at a pressure of 645 mm Hg?

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

Exam 5: Gases

If equal masses of O2(g) and HBr(g) are in separate containers of equal volume and temperature, which one of these statements is true?

Correct AnswerverifiedShow Answer

What is the pressure of the sample of gas trapped in the open-tube mercury manometer shown below if atmospheric pressure is 742 mmHg and h = 16.7 cm?

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

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

Correct AnswerverifiedShow Answer

What is P in the table below?

Correct AnswerverifiedShow 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

Determine the pressure of the gas trapped in the apparatus shown below when the atmospheric pressure is 695 mmHg.

Correct AnswerverifiedShow Answer

What is the pressure (in atmospheres)of the sample of gas trapped in the closed-tube mercury manometer shown below if h = 23.6 cm?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

What is P in the table below?

Correct AnswerverifiedShow Answer

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

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

Correct AnswerverifiedDue to the reduced a...View AnswerShow Answer

A 2.50-L flask contains a mixture of methane (CH4) and propane (C3H8) at a pressure of 1.45 atm and 20°C. When this gas mixture is then burned in excess oxygen, 8.60 g of carbon dioxide is formed. (The other product is water.) What is the mole fraction of methane in the original gas mixture?

Correct AnswerverifiedShow Answer

Correct AnswerverifiedThe volume of both N...View AnswerShow Answer

What volume of H2 is formed at STP when 6.0 g of Al is treated with excess NaOH? 2NaOH + 2Al + 6H2O →\rarr→ 2NaAl(OH)4 + 3H2(g)

Correct AnswerverifiedShow Answer

A 1.17 g sample of an alkane hydrocarbon gas occupies a volume of 674 mL at 28°C and 741 mmHg. Alkanes are known to have the general formula CnH2n+2. What is the molecular formula of the gas in this sample? (R = 0.08206 L.atm/K.mol)

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

At what temperature will a fixed mass of gas with a volume of 125 L at 15°C and 750 mmHg occupy a volume of 101 L at a pressure of 645 mm Hg?

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

If equal masses of O₂(g) and HBr(g) are in separate containers of equal volume and temperature, which one of these statements is true?

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

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

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

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

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
Due to the reduced a...
View Answer

A 2.50-L flask contains a mixture of methane (CH₄) and propane (C₃H₈) at a pressure of 1.45 atm and 20°C. When this gas mixture is then burned in excess oxygen, 8.60 g of carbon dioxide is formed. (The other product is water.) What is the mole fraction of methane in the original gas mixture?

Correct Answer
verified

Correct Answer
verified
The volume of both N...
View Answer

What volume of H₂ is formed at STP when 6.0 g of Al is treated with excess NaOH? 2NaOH + 2Al + 6H₂O $\rarr$ 2NaAl(OH)₄ + 3H₂(g)

Correct Answer
verified

Correct Answer
verified

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