Question 1

Calculate the volume occupied by 25.2 g of CO2 at 0.84 atm and 25 ∘\circ∘ C. R = 0.08206 L.atm/K.mol.

Accepted Answer

A)   0.060 L
B)   1.34 L
C)   16.7 L
D)   24.2 L
E)   734 L F) B) and C)
G) D) and E)

Question 2

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 (mL)  of gas in our sandwich bag

Accepted Answer

A)   250 mL
B)   260 mL
C)   270 mL
D)   280 mL
E)   None of the aboveF) B) and E)
G) A) and B)

Question 3

How many liters of oxygen gas at 153 ∘\circ∘ 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)   0.085 L
B)   3.0 L
C)   4.20 L
D)   7.79 L
E)   11.7 L F) B) and E)
G) B) and C)

Question 4

How many grams of N2O, nitrous oxide, are contained in 500. mL of the gas at STP

Accepted Answer

A)   0.782 g
B)   0.882 g
C)   0.982 g
D)   1.082 g
E)   None of the aboveF) All of the above
G) None of the above

Question 5

Which gas has molecules with the greatest average molecular speed at 25 ∘\circ∘ C

Accepted Answer

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

Question 6

Gases are sold in large cylinders for laboratory use. What pressure, in atmospheres, will be exerted by 2,500 g of oxygen gas (O2)  when stored at 22 ∘\circ∘ C in a 40.0 L cylinder

Accepted Answer

A)   3.6 atm
B)   10. atm
C)   47 atm
D)   1,500 atm
E)   7.6 * 104 atm F) All of the above
G) A) and B)

Question 7

The magnitude of the van der Waals "a" constant reflects the strength of the attractions between molecules of a given type of gas.

Accepted Answer

A) True 
 B)False

Question 8

Which of these gases will have the greatest density at the same specified temperature and pressure

Accepted Answer

A)   H2
B)   CClF3
C)   CO2
D)   C2H6
E)   CF4F) A) and C)
G) A) and D)

Question 9

A sample of oxygen gas has a volume of 545 mL at 35 ∘\circ∘ C. The gas is heated to 151ºC at constant pressure in a container that can contract or expand. What is the final volume of the oxygen gas

Accepted Answer

A)   750. mL
B)   396 mL
C)   417 mL
D)   267 mL
E)   126 mL F) C) and D)
G) A) and E)

Question 10

A 792 mg sample of a gas containing only sulfur and oxygen occupies a volume of 372 mL at 54 ∘\circ∘ C and 678 mmHg. Identify the gas in the sample. (R = 0.08206 L*atm/K*mol)

Accepted Answer

A)   SO
B)   SO2
C)   SO3
D)   S2O
E)   S2O2 F) D) and E)
G) A) and B)

Question 11

A "gas" is a substance in which the molecules are separated on the average by distances that are large compared with the sizes of the molecules.

Accepted Answer

A) True 
 B)False

Question 12

Which of the following describes Dalton's Law

Accepted Answer

A)   The pressure of a gas is proportional to its volume.
B)   The total pressure of a gas mixture is the sum of the partial pressures of each gas in the mixture.
C)   The temperature of a gas is proportional to its volume.
D)   Only one variable can be changed from an initial state to a final state for a gas.E) A) and B)
F) A) and C)

Question 13

If the pressure of a gas sample is quadrupled and the absolute temperature is doubled, by what factor does the volume of the sample change

Accepted Answer

A)   8
B)   2
C)   1/2
D)   1/4
E)   1/8F) C) and D)
G) None of the above

Question 14

A particular coal sample contains 2.32% S. When the coal is burned, the sulfur is converted to sulfur dioxide gas. What volume (L) of SO2(g), measured at 25$\circ$C and 749 mmHg, is produced by burning 2.0 * 106 lb of this coal
 (1 lb = 454 g)

Accepted Answer

Question 15

Determine the molar mass of Freon-11 gas if a sample weighing 0.597 g occupies 100. cm3 at 95 ∘\circ∘ C, and 1,000. mmHg.

Accepted Answer

A)   0.19 g/mol
B)   35.3 g/mol
C)   70.9 g/mol
D)   137 g/mol
E)   384 g/mol F) B) and E)
G) C) and D)

Question 16

10.0 g of gaseous ammonia and 6.50 g of oxygen gas are introduced into a previously evacuated 5.50 L vessel. If the ammonia and oxygen then react to yield NO gas and water vapor, what is the final density of the gas mixture inside the vessel at 23ºC

Accepted Answer

A)   1.32 g/L
B)   1.68 g/L
C)   2.20 g/L
D)   3.00 g/L
E)   16.5 g/LF) B) and D)
G) A) and D)

Question 17

Baking powder is made up of sodium hydrogen carbonate and calcium hydrogen phosphate. When baking powder is wet, these components react to produce carbon dioxide. The equation for this reaction is given below.NaHCO3(aq)  + CaHPO4(aq)   →\rarr→ NaCaPO4(aq)  + CO2(g)  + H2O(l)  Assuming all of the carbon dioxide was released as a gas, how many liters of CO2(g)  would be formed at room temperature from 4.00 g of NaHCO3 and excess CaHPO4

Accepted Answer

A)   Approximately 1.16 liters
B)   Approximately 1.36 liters
C)   Approximately 1.56 liters
D)   Approximately 1.76 liters
E)   None of the above F) A) and E)
G) A) and D)

Question 18

On a spring morning (20. ∘\circ∘ C)  you fill your tires to a pressure of 2.25 atmospheres. As you ride along, the tire heats up to 45 ∘\circ∘ C from the friction on the road. What is the pressure in your tires now in units of atmospheres

Accepted Answer

A)   2.14 atmospheres
B)   2.34 atmospheres
C)   2.64 atmospheres
D)   2.94 atmospheres
E)   None of the above F) None of the above
G) A) and E)

Question 19

A 250 mL flask contains 3.4 g of neon gas at 45 ∘\circ∘ C. Calculate the pressure of the neon gas inside the flask.

Accepted Answer

A)   0.050 atm
B)   0.46 atm
C)   18 atm
D)   38 atm
E)   3.5 x 102 atm F) A) and B)
G) A) and C)

Question 20

5.00 g of hydrogen gas and 50.0 g of oxygen gas are introduced into an otherwise empty 9.00 L steel cylinder, and the hydrogen is ignited by an electric spark. If the reaction product is gaseous water and the temperature of the cylinder is maintained at 35ºC, what is the final gas pressure inside the cylinder

Accepted Answer

A)   0.92 atm
B)   2.58 atm
C)   6.96 atm
D)   7.86 atm
E)   18.3 atmF) C) and D)
G) B) and E)

Exam 5: Gases

A "gas" is a substance in which the molecules are separated on the average by distances that are large compared with the sizes of the molecules.

Correct Answer
verified

Gases are sold in large cylinders for laboratory use. What pressure, in atmospheres, will be exerted by 2,500 g of oxygen gas (O₂) when stored at 22^$\circ$C in a 40.0 L cylinder

Correct Answer
verified

Calculate the volume occupied by 25.2 g of CO₂ at 0.84 atm and 25^$\circ$C. R = 0.08206 L.atm/K.mol.

Correct Answer
verified

Which gas has molecules with the greatest average molecular speed at 25^$\circ$C

Correct Answer
verified

If the pressure of a gas sample is quadrupled and the absolute temperature is doubled, by what factor does the volume of the sample change

Correct Answer
verified

A 250 mL flask contains 3.4 g of neon gas at 45^$\circ$C. Calculate the pressure of the neon gas inside the flask.

Correct Answer
verified

Determine the molar mass of Freon-11 gas if a sample weighing 0.597 g occupies 100. cm³ at 95^$\circ$C, and 1,000. mmHg.

Correct Answer
verified

Correct Answer
verified

A particular coal sample contains 2.32% S. When the coal is burned, the sulfur is converted to sulfur dioxide gas. What volume (L) of SO₂(g), measured at 25^$\circ$C and 749 mmHg, is produced by burning 2.0 * 10⁶ lb of this coal (1 lb = 454 g)

Correct Answer
verified

A 792 mg sample of a gas containing only sulfur and oxygen occupies a volume of 372 mL at 54^$\circ$C and 678 mmHg. Identify the gas in the sample. (R = 0.08206 Latm/Kmol)

Correct Answer
verified

How many grams of N₂O, nitrous oxide, are contained in 500. mL of the gas at STP

Correct Answer
verified

A sample of oxygen gas has a volume of 545 mL at 35^$\circ$C. The gas is heated to 151ºC at constant pressure in a container that can contract or expand. What is the final volume of the oxygen gas

Correct Answer
verified

How many liters of oxygen gas at 153^$\circ$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

On a spring morning (20.^$\circ$C) you fill your tires to a pressure of 2.25 atmospheres. As you ride along, the tire heats up to 45^$\circ$C from the friction on the road. What is the pressure in your tires now in units of atmospheres

Correct Answer
verified

Which of the following describes Dalton's Law

Correct Answer
verified

Correct Answer
verified

Which of these gases will have the greatest density at the same specified temperature and pressure

Correct Answer
verified

10.0 g of gaseous ammonia and 6.50 g of oxygen gas are introduced into a previously evacuated 5.50 L vessel. If the ammonia and oxygen then react to yield NO gas and water vapor, what is the final density of the gas mixture inside the vessel at 23ºC

Correct Answer
verified

Correct Answer
verified

The magnitude of the van der Waals "a" constant reflects the strength of the attractions between molecules of a given type of gas.

Correct Answer
verified

Exam 5: Gases

A "gas" is a substance in which the molecules are separated on the average by distances that are large compared with the sizes of the molecules.

Correct AnswerverifiedShow Answer

Gases are sold in large cylinders for laboratory use. What pressure, in atmospheres, will be exerted by 2,500 g of oxygen gas (O2) when stored at 22 ∘\circ∘ C in a 40.0 L cylinder

Correct AnswerverifiedShow Answer

Calculate the volume occupied by 25.2 g of CO2 at 0.84 atm and 25 ∘\circ∘ C. R = 0.08206 L.atm/K.mol.

Correct AnswerverifiedShow Answer

Which gas has molecules with the greatest average molecular speed at 25 ∘\circ∘ C

Correct AnswerverifiedShow Answer

If the pressure of a gas sample is quadrupled and the absolute temperature is doubled, by what factor does the volume of the sample change

Correct AnswerverifiedShow Answer

A 250 mL flask contains 3.4 g of neon gas at 45 ∘\circ∘ C. Calculate the pressure of the neon gas inside the flask.

Correct AnswerverifiedShow Answer

Determine the molar mass of Freon-11 gas if a sample weighing 0.597 g occupies 100. cm3 at 95 ∘\circ∘ C, and 1,000. mmHg.

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

A particular coal sample contains 2.32% S. When the coal is burned, the sulfur is converted to sulfur dioxide gas. What volume (L) of SO2(g), measured at 25 ∘\circ∘ C and 749 mmHg, is produced by burning 2.0 * 106 lb of this coal (1 lb = 454 g)

Correct AnswerverifiedShow Answer

A 792 mg sample of a gas containing only sulfur and oxygen occupies a volume of 372 mL at 54 ∘\circ∘ C and 678 mmHg. Identify the gas in the sample. (R = 0.08206 L*atm/K*mol)

Correct AnswerverifiedShow Answer

How many grams of N2O, nitrous oxide, are contained in 500. mL of the gas at STP

Correct AnswerverifiedShow Answer

A sample of oxygen gas has a volume of 545 mL at 35 ∘\circ∘ C. The gas is heated to 151ºC at constant pressure in a container that can contract or expand. What is the final volume of the oxygen gas

Correct AnswerverifiedShow Answer

How many liters of oxygen gas at 153 ∘\circ∘ 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

On a spring morning (20. ∘\circ∘ C) you fill your tires to a pressure of 2.25 atmospheres. As you ride along, the tire heats up to 45 ∘\circ∘ C from the friction on the road. What is the pressure in your tires now in units of atmospheres

Correct AnswerverifiedShow Answer

Which of the following describes Dalton's Law

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

Which of these gases will have the greatest density at the same specified temperature and pressure

Correct AnswerverifiedShow Answer

10.0 g of gaseous ammonia and 6.50 g of oxygen gas are introduced into a previously evacuated 5.50 L vessel. If the ammonia and oxygen then react to yield NO gas and water vapor, what is the final density of the gas mixture inside the vessel at 23ºC

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

The magnitude of the van der Waals "a" constant reflects the strength of the attractions between molecules of a given type of gas.

Correct AnswerverifiedShow Answer

Correct Answer
verified

Gases are sold in large cylinders for laboratory use. What pressure, in atmospheres, will be exerted by 2,500 g of oxygen gas (O₂) when stored at 22^$\circ$C in a 40.0 L cylinder

Correct Answer
verified

Calculate the volume occupied by 25.2 g of CO₂ at 0.84 atm and 25^$\circ$C. R = 0.08206 L.atm/K.mol.

Correct Answer
verified

Which gas has molecules with the greatest average molecular speed at 25^$\circ$C

Correct Answer
verified

Correct Answer
verified

A 250 mL flask contains 3.4 g of neon gas at 45^$\circ$C. Calculate the pressure of the neon gas inside the flask.

Correct Answer
verified

Determine the molar mass of Freon-11 gas if a sample weighing 0.597 g occupies 100. cm³ at 95^$\circ$C, and 1,000. mmHg.

Correct Answer
verified

Correct Answer
verified

A particular coal sample contains 2.32% S. When the coal is burned, the sulfur is converted to sulfur dioxide gas. What volume (L) of SO₂(g), measured at 25^$\circ$C and 749 mmHg, is produced by burning 2.0 * 10⁶ lb of this coal (1 lb = 454 g)

Correct Answer
verified

A 792 mg sample of a gas containing only sulfur and oxygen occupies a volume of 372 mL at 54^$\circ$C and 678 mmHg. Identify the gas in the sample. (R = 0.08206 Latm/Kmol)

Correct Answer
verified

How many grams of N₂O, nitrous oxide, are contained in 500. mL of the gas at STP

Correct Answer
verified

A sample of oxygen gas has a volume of 545 mL at 35^$\circ$C. The gas is heated to 151ºC at constant pressure in a container that can contract or expand. What is the final volume of the oxygen gas

Correct Answer
verified

How many liters of oxygen gas at 153^$\circ$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

On a spring morning (20.^$\circ$C) you fill your tires to a pressure of 2.25 atmospheres. As you ride along, the tire heats up to 45^$\circ$C from the friction on the road. What is the pressure in your tires now in units of atmospheres

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified