Question 1

A fixed amount of gas at 25.0 °C occupies a volume of 10.0 L when the pressure is 751 torr.Use Boyle's law to calculate the pressure (torr) when the volume is reduced to 7.25 L at a constant temperature of 3 B) 0.097 C) 5.44 ×   D) 544 E) 1.36" class="answers-bank-image d-inline" rel="preload" >

Accepted Answer

A)  1.04 × 103
B)  0.097
C)  5.44 × 3 
B)  0.097 
C)  5.44 ×   
D)  544 
E)  1.36" class="answers-bank-image d-inline" rel="preload" >
D)  544
E)  1.36F) B) and C)
G) D) and E)

Question 2

760 torr is equivalent to ________ mm Hg.

Accepted Answer

A)  380
B)  4.78 × 103
C)  1
D)  760
E)  121F) All of the above
G) A) and E)

Question 3

SO2 (5.00 g) and CO2 (5.00 g) were placed in a 750.0 mL container at 50.0 °C.The partial pressure of CO2 in the container was ________ atm.

Accepted Answer

A)  6.78
B)  2.76
C)  1.60
D)  0.192
E)  4.02F) C) and D)
G) B) and C)

Question 4

The average kinetic energy of the particles of a gas is ________ proportional to ________.

Accepted Answer

A)  directly, the rms speed
B)  directly, the square root of the rms speed
C)  inversely, the square of the rms speed
D)  directly, the square of the rms speed
E)  inversely, the particle massF) A) and B)
G) A) and C)

Question 5

A balloon originally had a volume of 4.39 L at 44 °C and a pressure of 729 torr.The balloon must be cooled to ________ °C to reduce its volume to 3.99 L (at constant pressure) .

Accepted Answer

A)  0.00
B)  15.1
C)  -288
D)  288
E)  546F) A) and B)
G) A) and C)

Question 6

Which of the following equations shows an incorrect relationship between pressures given in terms of different units?

Accepted Answer

A)  1.20 atm = 122 kPa
B)  152 mm Hg = 2.03 × 104 Pa
C)  0.760 atm = 578 mm Hg
D)  1.0 torr = 2.00 mm Hg
E)  1.00 atm = 760 torrF) C) and E)
G) All of the above

Question 7

Which of the following is not a unit of pressure?

Accepted Answer

A)  mm Hg
B)  mm
C)  atm
D)  Pa
E)  psiF) B) and D)
G) A) and B)

Question 8

A gas mixture of N2 and H2 has a total pressure of 9.40 atm and contains 11.3 mol of gas.If the partial pressure of N2 is 4.89 atm,how many moles of H2 are in the mixture?

Accepted Answer

A)  4.51
B)  5.65
C)  5.42
D)  11.3
E)  5.88F) C) and E)
G) D) and E)

Question 9

A gas originally at 27 °C and 1.00 atm pressure in a 3.3 L flask is cooled at constant pressure until the temperature is 11 °C.The new volume of the gas is ________ L.

Accepted Answer

A)  0.27
B)  3.1
C)  3.3
D)  3.5
E)  0.24F) A) and B)
G) A) and C)

Question 10

If pressure and temperature are kept constant,the reaction of 38 mL of Cl2 gas with 22 mL of CH4 gas via the equation: Cl2 (g) + CH4 (g) → HCl (g) + CH3Cl (g) 
Will produce a total of ________ mL of products.

Accepted Answer

A)  16
B)  30
C)  60
D)  38
E)  22F) A) and E)
G) C) and D)

Question 11

Two deviations of real gases from ideal gases which are treated in the van der Waals equation are finite molecular volume and non-zero molecular attractions.

Accepted Answer

A) True 
 B)False

Question 12

What is the rms speed (m/s)of oxygen molecules at 36.0 °C?

Accepted Answer

The answer of What is the rms speed (m/s)of oxygen...

Question 13

Which one of the following gases would deviate the least from ideal gas behavior?

Accepted Answer

A)  Ne
B)  CH3Cl
C)  Kr
D)  CO2
E)  F2F) A) and B)
G) A) and E)

Question 14

A sample of CO2 gas (3.0 mol) effused through a pinhole in 18.0 s.It will take ________ s for the same amount of H2 to effuse under the same conditions.

Accepted Answer

A)  396
B)  3.84
C)  0.818
D)  84.4
E)  1.92F) A) and B)
G) A) and C)

Question 15

A flask contains a mixture of N2 and H2 at a total pressure of 5.20 atm.If there are 1.00 mol of H2 and 8.00 mol of N2 in the flask,what is the partial pressure (atm) of N2?

Accepted Answer

A)  2.60
B)  4.62
C)  5.20
D)  8.00
E)  0.578F) C) and D)
G) A) and B)

Question 16

Arrange the following gases in order of increasing average molecular speed at 25 °C. He,O2,CO2,N2

Accepted Answer

A)  He 2 2 2
B)  He 2 2 2
C)  CO2 2 2 
D)  CO2 2 2 
E)  CO2 2 2F) B) and E)
G) A) and D)

Question 17

What volume (mL) of sulfur dioxide can be produced by the complete reaction of 3.82 g of calcium sulfite with excess HCl (aq) ,when the final SO2 pressure is 827 torr at 44.0 °C?

Accepted Answer

A)  7.60 × 102
B)  1.39 × 10-4
C)  1.00 × 10-3
D)  0.106
E)  5.78 × 102F) C) and D)
G) C) and E)

Question 18

If 50.75 g of a gas occupies 10.0 L at STP,129.3 g of the gas will occupy ________ L at STP.

Accepted Answer

A)  3.92
B)  50.8
C)  12.9
D)  25.5
E)  5.08F) A) and D)
G) B) and E)

Question 19

The main component of air is oxygen.

Accepted Answer

A) True 
 B)False

Question 20

Which statement about atmospheric pressure is false?

Accepted Answer

A)  As air becomes thinner, its density decreases.
B)  Air actually has weight.
C)  With an increase in altitude, atmospheric pressure increases as well.
D)  The warmer the air, the lower the atmospheric pressure.
E)  Atmospheric pressure prevents water in lakes, rivers, and oceans from boiling away.F) C) and D)
G) All of the above

Exam 10: Gases

SO2 (5.00 g) and CO2 (5.00 g) were placed in a 750.0 mL container at 50.0 °C.The partial pressure of CO2 in the container was ________ atm.

Correct AnswerverifiedShow Answer

A fixed amount of gas at 25.0 °C occupies a volume of 10.0 L when the pressure is 751 torr.Use Boyle's law to calculate the pressure (torr) when the volume is reduced to 7.25 L at a constant temperature of

Correct AnswerverifiedShow Answer

If 50.75 g of a gas occupies 10.0 L at STP,129.3 g of the gas will occupy ________ L at STP.

Correct AnswerverifiedShow Answer

Which of the following is not a unit of pressure?

Correct AnswerverifiedShow Answer

The average kinetic energy of the particles of a gas is ________ proportional to ________.

Correct AnswerverifiedShow Answer

Two deviations of real gases from ideal gases which are treated in the van der Waals equation are finite molecular volume and non-zero molecular attractions.

Correct AnswerverifiedShow Answer

A gas mixture of N2 and H2 has a total pressure of 9.40 atm and contains 11.3 mol of gas.If the partial pressure of N2 is 4.89 atm,how many moles of H2 are in the mixture?

Correct AnswerverifiedShow Answer

Arrange the following gases in order of increasing average molecular speed at 25 °C. He,O2,CO2,N2

Correct AnswerverifiedShow Answer

A gas originally at 27 °C and 1.00 atm pressure in a 3.3 L flask is cooled at constant pressure until the temperature is 11 °C.The new volume of the gas is ________ L.

Correct AnswerverifiedShow Answer

A flask contains a mixture of N2 and H2 at a total pressure of 5.20 atm.If there are 1.00 mol of H2 and 8.00 mol of N2 in the flask,what is the partial pressure (atm) of N2?

Correct AnswerverifiedShow Answer

760 torr is equivalent to ________ mm Hg.

Correct AnswerverifiedShow Answer

A balloon originally had a volume of 4.39 L at 44 °C and a pressure of 729 torr.The balloon must be cooled to ________ °C to reduce its volume to 3.99 L (at constant pressure) .

Correct AnswerverifiedShow Answer

Which of the following equations shows an incorrect relationship between pressures given in terms of different units?

Correct AnswerverifiedShow Answer

Which one of the following gases would deviate the least from ideal gas behavior?

Correct AnswerverifiedShow Answer

The main component of air is oxygen.

Correct AnswerverifiedShow Answer

What is the rms speed (m/s)of oxygen molecules at 36.0 °C?

Correct AnswerverifiedShow Answer

Which statement about atmospheric pressure is false?

Correct AnswerverifiedShow Answer

What volume (mL) of sulfur dioxide can be produced by the complete reaction of 3.82 g of calcium sulfite with excess HCl (aq) ,when the final SO2 pressure is 827 torr at 44.0 °C?

Correct AnswerverifiedShow Answer

If pressure and temperature are kept constant,the reaction of 38 mL of Cl2 gas with 22 mL of CH4 gas via the equation: Cl2 (g) + CH4 (g) → HCl (g) + CH3Cl (g) Will produce a total of ________ mL of products.

Correct AnswerverifiedShow Answer

A sample of CO2 gas (3.0 mol) effused through a pinhole in 18.0 s.It will take ________ s for the same amount of H2 to effuse under the same conditions.

Correct AnswerverifiedShow Answer

SO₂ (5.00 g) and CO₂ (5.00 g) were placed in a 750.0 mL container at 50.0 °C.The partial pressure of CO₂ in the container was ________ atm.

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

The average kinetic energy of the particles of a gas is proportional to .

Correct Answer
verified

Correct Answer
verified

A gas mixture of N₂ and H₂ has a total pressure of 9.40 atm and contains 11.3 mol of gas.If the partial pressure of N₂ is 4.89 atm,how many moles of H₂ are in the mixture?

Correct Answer
verified

Arrange the following gases in order of increasing average molecular speed at 25 °C. He,O₂,CO₂,N₂

Correct Answer
verified

Correct Answer
verified

A flask contains a mixture of N₂ and H₂ at a total pressure of 5.20 atm.If there are 1.00 mol of H₂ and 8.00 mol of N₂ in the flask,what is the partial pressure (atm) of N₂?

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

What volume (mL) of sulfur dioxide can be produced by the complete reaction of 3.82 g of calcium sulfite with excess HCl (aq) ,when the final SO₂ pressure is 827 torr at 44.0 °C?

Correct Answer
verified

If pressure and temperature are kept constant,the reaction of 38 mL of Cl₂ gas with 22 mL of CH₄ gas via the equation: Cl₂ (g) + CH₄ (g) → HCl (g) + CH₃Cl (g) Will produce a total of ________ mL of products.

Correct Answer
verified

A sample of CO₂ gas (3.0 mol) effused through a pinhole in 18.0 s.It will take ________ s for the same amount of H₂ to effuse under the same conditions.

Correct Answer
verified