1、A gas at a pressure of 10.0 Pa exerts a force of __________ N on an area of 5.5 m2.
A、55
B、18
C、0.55
D、1.8
E、5.5
2、A gas vessel is attached to an open-end manometer containing a non- volatile liquid of density 0.791 g/mL as shown below. The difference in heights of the is 755 mm Hg. Given that the density of mercury is 13.6 g/mL, the pressure of the enclosed gas
A、0.99
B、0.987
C、0.993
D、1.03
E、0.96
3、A sample of a gas (5.0 mol) at 1.0 atm is expanded at constant temperature from 10 L to 15 L. The final pressure is __________ atm.
A、3.3
B、0.67
C、1.5
D、7.5
E、15
4、A sample of H2 gas (12.28 g) occupies 100.0 L at 400.0 K and 2.00 atm. A sample weighing 9.49 g occupies__________ L at 353 K and 2.00 atm.
A、147
B、68.2
C、109
D、54.7
E、77.3
5、A 0.325 L flask filled with gas at 0.914 atm and 19 °C contains __________ mol of gas.
A、1.48 × 10-2
B、1.24 × 10-2
C、80.7
D、9.42
E、12.4
6、A sample of gas (1.3 mol) occupies __________ L at 22 °C and 2.5 atm.
A、13
B、0.079
C、31
D、3.2 × 10-2
E、0.94
7、A flask contains a mixture of He and Ne at a total pressure of 2.6 atm. There are 2.0 mol of He and 5.0 mol of Ne in the flask. The partial pressure of He is __________ atm.
A、0.74
B、1.86
C、6.5
D、1.04
E、9.1
8、The root-mean-square speed of CO at 113 °C is __________ m/s.
A、993
B、58.3
C、31.5
D、586
E、317
9、A sample of N2 gas (2.0 mmol) effused through a pinhole in 5.5 s. It will take __________ s for the same amount of CH4 to effuse under the same conditions.
A、9.6
B、5.5
C、7.3
D、3.1
E、4.2
10、Using the van der Waals equation, the pressure in a 22.4 L vessel containing 1.00 mol of neon gas at 100 °C is__________ atm. (a = 0.211 L2 atm/mol2 , b = 0.0171 L/mol)
A、1
B、0.73
C、1.21
D、0.367
E、1.37
