Name____________________________
10pts (points marked)
Chem 1A Chapter 10 Worksheet: Gases
Show your work, your answers will not
be counted without shown work.
1) If a gas in a container with a fixed volume has a pressure of 748 torr at 15°C, the pressure will
double at _____°C.
2) The effusion rate of Kr is ____ than the effusion rate of N2 by a factor of ____.
a. Faster, 2.99
b. Slower, 0.334
c. Slower, 0.578
d. Faster, 1.73
3) What is the molar mass of an ideal gas with a density of 2.76 g/L at STP?
4) How many moles of O2 were yielded in an experiment if 3.85 L of O2 was gathered over water at
24 °C and a total pressure of 768.5 torr? The table of the partial pressure of water vapor is
included below.
Vapor Pressure of Water
5) What is the volume of 6.79 g of N2 gas at 110 °C at 782 torr.
Show your work and box your answer.
°C
0
5
10
15
16
17
18
19
20
21
22
23
24
25
torr °C
torr
4.6
26
25.2
6.5
27
26.7
9.2
28
28.3
12.8
29
30.0
13.6
30
31.8
14.5
40
55.3
15.5
50
92.5
16.5
60 149.4
17.5
70 233.7
18.7
80 355.1
19.8
90 525.8
21.1 100 760.0
22.4 105 906.1
23.8 110 1074.6
6) What is the volume of CO2 (acting as an ideal gas) if 64.0 mL of 1.261 M HCl reacts with excess
CaCO3 at 28 ˚C and 0.987 atm? Show your work and box your answer
2HCl + CaCO3 → H2O + CO2 + CaCl2