# Gas Law Review3: Question Preview (ID: 17879)

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**14. What is the standard molar volume of a gas at STP?**

a) 62.1

b) 88.5

c) 11.5

d) 22.4

**15. A container holds 500 mL of CO2 at 20 degrees Celsius and 742 torr. What will be the volume of CO2 if the pressure is increased to 795 torr?**

a) 466.66

b) 588.88

c) 846.18

d) 854.11

**16. A gas tank holds 2785 L of propane at 830 mm Hg. What is the volume of propane at STP?**

a) 8497.2

b) 4684.6

c) 3041.5

d) 6548.2

**17. A container holds 50 mL of nitrogen at 25 degrees Celsius and a pressure of 736 mm Hg. What will be its volume if the temperature increases by 35 degrees Celsius?**

a) 62.81

b) 42.97

c) 51.68

d) 87.87

**18. A sample of oxygen occupies a volume of 160 L at 91 degrees Celsius. What will be the volume of oxygen when the temperature drops to 0 degrees Celsius?**

a) 420

b) 120

c) 560

d) 240

**19. A mylar balloon is filled with helium gas to a pressure of 107 kPa when the temperature is 22 degrees Celsius. If the temperature changes to 45 degrees Celsius, what will be the pressure of the helium in the balloon?**

a) 225.64

b) 587.12

c) 115.34

d) 284.64

**20. A cylinder of compressed gas has a pressure of 4.882 atm on one day. The next day the same cylinder has a pressure of 4.690 atm, and itâ€™s temperature is 8 degrees Celsius. What was the temperature on the previous day in degrees Celsius?**

a) 815.3

b) 946.7

c) 648.2

d) 292.5

**21. A gas take up a volume of 17 liters, has a pressure of 2.3 atm, and a temperature of 299 K. If I raise the temperature to 350 K and lower the pressure to 1.5 atm, what is the new volume of the gas?**

a) 30.5

b) 21.2

c) 37.8

d) 41.5

**22. A gas has a volume of 28 liters, a temperature of 45 degrees Celsius, and an unknown pressure has its volume increased to 34 liters and its temperature decreased to 35 degrees Celsius. If I measure the pressure after the change to be 2.0 atm, wha**

a) 7.2

b) 2.5

c) 3.6

d) 5.1

**23. Three flasks are connected to one another. The first flask contains helium at a pressure of 1.54 atm, the second flask contains nitrogen at .74 atm, and the third flask contains oxygen at 1.06 atm. What is the total pressure of this system?**

a) 9.65

b) 1.65

c) 2.23

d) 3.34

**24. If I added hydrogen to the system above and the total pressure increased to 4 atm, what was the partial pressure of hydrogen?**

a) 0.66

b) 0.49

c) 1.47

d) 1.11

**25. How many moles of gas does it take to occupy 120 liters at a pressure of 2.3 atm and a temperature of 340 K?**

a) 14.89

b) 20.15

c) 36.22

d) 10.15

**26. If I have a 50 liter container that holds 45 moles of gas at a temperature of 200 degrees Celsius, what is the pressure inside the container?**

a) 30.7

b) 34.1

c) 43.9

d) 40.1

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