Chem 051 - Fundamentals of Chemistry » Winter 2021 » Homework GOB Week 3
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Question #1
A gas occupies 26.2 L at 2.00 atm pressure and 27oC. Calculate its volume if the pressure remains at 2.0 atm but the temperature is raised to 54oC.
A.
19.1 L
B.
52.4 L
C.
24.0 L
D.
0.0350 L
E.
28.6 L
Question #2
Which of the following is a correct statement of Charles’ law, V/T = k?
A.
The pressure of a gas sample varies inversely with the volume.
B.
The volume of a gas varies proportionally with the pressure.
C.
All gas samples of the same volume at STP contain the same number of atoms.
D.
The volume of a gas sample varies proportionally with the absolute temperature.
E.
All gas samples of the same volume at STP contain the same number of molecules.
Question #3
The air in the inner tube of the tire of a racing bike has a pressure of 107.9 psi. Convert this pressure to atm.
A.
1.065 atm
B.
1586 atm
C.
7.340 atm
D.
0.1420 atm
E.
107.9 atm
Question #4
Convert 3.1 × 102 atm to torr.
A.
2.4 × 105 torr
B.
22 torr
C.
3.1 × 104 torr
D.
4.6 × 104 torr
E.
0.41 torr
Question #5
A flexible vessel contains 49 L of gas where the pressure is 1.3 atm. What will the volume be when the pressure is 0.76 atm, the temperature remaining constant?
A.
0.012 L
B.
84 L
C.
0.042 L
D.
29 L
E.
49 L
Question #6
3.35 mol of CO2 at STP will occupy
A.
81.9 L
B.
37.5 L
C.
75.0 g
D.
9.87 × 10–2 L
E.
75.0 L
Question #7
The volume of a sample of gas measured at 25.0°C and 1.00 atm pressure is 10.0 L. What must the final temperature be in order for the gas to have a final volume of 7.5 L at 1.00 atm pressure?
A.
–55°C
B.
–35°C
C.
–50°C
D.
–45°C
E.
19°C
Question #8
A balloon has a volume of 2.96 liters at 24.0oC. The balloon is heated to 48.0oC. Calculate the new volume of the balloon.
A.
5.92 L
B.
2.74 L
C.
3.20 L
D.
1.480 L
E.
2.96 L
Question #9
A 32.2-mL sample of H2 at STP would contain how many grams of hydrogen?
A.
2.90 g
B.
1.44 × 10–3 g
C.
2.90 × 10–3 g
D.
1.40 × 103 g
E.
1.44 g
Question #10
The volume of one mole of nitrogen
A.
has the value of 22.4 L at 0°C and 1.00 atm.
B.
is lower than that of ammonia at high pressures.
C.
is increased by decreasing the temperature.
D.
is decreased by decreasing the pressure of the gas.
E.
is decreased by increasing its kinetic energy.
Question #11
What volume will 44.2 g of N2 occupy at STP?
A.
none of these
B.
35.4 L
C.
38.6 L
D.
3.24 L
E.
4.65 × 10–2 L
Question #12
A glass column is filled with mercury and inverted in a pool of mercury. The mercury column stablizes at a height of 737 mm above the pool of mercury. What is the pressure of the atmosphere?
A.
0.970 atm
B.
1.03 atm
C.
0.737 atm
D.
464 atm
E.
0.646 atm
Question #13
If temperature and pressure are held constant, the volume and number of moles of a gas are
A.
equal
B.
independent of each other
C.
directly proportional
D.
inversely proportional
E.
not enough information given
Question #14
Convert 9.26 × 102 torr to psi.
A.
1.34 × 102 psi
B.
4.79 × 104 psi
C.
1.22 psi
D.
1.36 × 104 psi
E.
17.9 psi
Question #15
Consider a gas at 1.00 atm in a 5.00-L container at 20.oC. What pressure does the gas exert when transferred to a volume of 4.65 L at 43oC?
A.
1.003 atm
B.
2.31 atm
C.
1.16 atm
D.
0.371 atm
E.
1.00 atm
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