HW 11
REVIEW QUESTIONS
Chapter 11
Gas Laws:
- Indicate which diagram represents the volume of the gas sample in a balloon when each of the following changes takes place:
A) The temperature increases at constant pressure:
B) The pressure increases at constant temperature:
C) Both the pressure and the absolute temperature are doubled: - The pressure of a sample of gas with a volume of 125 mL is decreased from 2.50 atm to 1.50 atm . What is the new volume?
- A sample of nitrogen gas with a volume of 10.0 L has a temperature of
. What is the volume of this gas at at constant pressure? - 18 g of Argon occupy 750 mL at a particular temperature and pressure. How many grams of methane
would occupy the same volume at the same temperature and pressure? - The volume of air in a person's lungs is 615 mL at a pressure of 760 mmHg . When inhalation occurs, the pressure in the lungs drops to 752 mmHg . To what volume did the lungs expand during inhalation?
- A gas in an aerosol container has a pressure of 1.40 atm at
. What is the pressure in the container if the temperature increases to ? - A scuba diver 40 ft below the ocean surface inhales 50.0 mL of compressed air in a scuba tank at a pressure of 3.00 atm at a temperature of
. What is the pressure of the air in the lungs if the gas expands to 150.0 mL at a body temperature of ?
STP & Molar Volume:
- A gas has a volume of 125 mL at 630 mmHg and
. What will the volume be at STP? - What volume will 30.0 g of methane gas
occupy at STP? - Calculate the number of moles of
in 4.00 L of gas at STP. - Calculate the volume ( mL ) occupied by 50.0 g of neon gas at STP.
- How many grams of aluminum will react with 12.0 L of oxygen at STP as shown below:
- What is the molar mass of a gas if 1.15 g of the gas has a volume of 225 mL at STP?
- How many liters of oxygen gas are required to completely react with 12.0 L of propane at constant temperature and pressure, as shown below:
Ideal Gas Law:
- What volume is occupied by 15.0 g of HCl gas at 715 mmHg and
? - A
sample of krypton has a temperature of at 575 mmHg . What is the volume ( mL ) of this gas at these conditions? - A sample of gas occupies 855 mL at 1.20 atm and
. How many moles of gas are present in this sample? - A steel cylinder with a volume of 15.0 L is filled with 50.0 g of nitrogen gas at
. What is the pressure of the nitrogen gas in the cylinder?
Partial Pressure:
- An anesthetic consists of a mixture of cyclopropane gas (
) and oxygen gas. If the mixture has a total pressure of 1.09 atm , and the partial pressure of the cyclopropane is 73 mmHg , what is the partial pressure of the oxygen in mmHg ? - A gas mixture consists of nitrogen ( 425 torr), oxygen ( 115 torr) and helium ( 225 torr). What is the total pressure of this mixture in torrs?
- A mixture containing 4.33 g of
and 3.11 g of has a total pressure of 1.09 atm . What is the partial pressure of in the mixture?
ANSWERS:
1A) C
1B) A
1C) B
2) 208 mL
3) 15.3 L
4) 7.2 g
5) 622 mL
6) 1.51 atm
7)
8) 94.3 mL
9) 41.9 L
10) 0.179 mol
11)
12) 19.3 g
13)
14) 60.0 L
15) 13.0 L
16) 3850 mL
17) 0.0430 mol
18)
19) 755 mmHg
20) 765 torr
21)
1B) A
1C) B
2) 208 mL
3) 15.3 L
4) 7.2 g
5) 622 mL
6) 1.51 atm
7)
8) 94.3 mL
9) 41.9 L
10) 0.179 mol
11)
12) 19.3 g
13)
14) 60.0 L
15) 13.0 L
16) 3850 mL
17) 0.0430 mol
18)
19) 755 mmHg
20) 765 torr
21)