Choose the correct answer for each question.

**If 4 gases in a cylinder each exert a pressure of 4 atm, what is the total pressure in the cylinder?**- 4 atm
- 1 atm
- 16 atm
- 8 atm

**A sample of air has a volume of 140.0 mL at 67°C. At what temperature will its volume be 50.0 mL at constant pressure?**- 121 K
- -152 K
- 121°C
- 152°C

**Why would the pressure in a container of gas rise 2.56 kPa? (Temperature remains the same)**- The volume of the container increased.
- The volume of the container decreased
- The container leaks
- This can't happen

**A sample of gas at 47°C and 1.03 atm occupies a volume of 2.20 L. What volume would this gas occupy at 107°C and 0.789 atm?**- 3.41 L
- 4.31 L
- 2.06 L
- 1.10 L

**If temperature of a fixed quantity of gas increases, and the pressure remains unchanged,**- volume increases
- volume decreases
- density increases
- density decreases

**What is the partial pressure of oxygen collected by water displacement if the water temperature is 20.0°C and the total pressure of the gases in the collection bottle is 730.0 mm? (NOTE: P**_{water}at 20.0°C = 17.5 mm Hg)- 712.5 mm Hg
- 699.8 mm Hg
- 17.5 mm Hg
- 747.5 mm Hg

**A sample of hydrogen at 47°C exerts a pressure of 0.329 atm. The gas is heated to 77°C at constant volume. What will its new pressure be?**- 0.360 atm
- 1.923 atm
- 0.54 atm
- 2.01 atm

**Assuming temperature remains constant, how can you decrease the pressure of a gas?**- decrease the mass of the gas molecules
- decrease the size of the container
- increase the rate of diffusion of gas molecules
- increase the number of gas molecules in the container

**A 350 mL sample of air collected at 35°C has a pressure of 550 torr. What pressure will the air exert if it is allowed to expand to 425 mL at 57°C?**- 485 torr
- 40.4 torr
- 7940 torr
- 166.1 torr

**Who came up with the law of partial pressure?**- Dalton
- Boyle
- Cecere
- Gay-Lussac

**A gas has a volume of 200 mL and a pressure of 350 torr. If temperature is constant, what is the new volume of the gas at 700 torr?**- 100 mL
- 400 mL
- 300 mL
- 50 mL

**What is 23°C expressed in Kelvin?**- 296 K
- 250 K
- -250 K
- 0 K

**To what temperature must a sample of nitrogen at 27°C and 0.625 atm be taken so that its pressure becomes 1.125 atm at constant volume?**- 540 K
- 267 K
- -267 K
- 540°C

**Why does the pressure increase inside a car tire after it is driven for a while?**- the temperature increases
- The atmosphere compresses the tire.
- the volume of the tire decreases
- the air particles in the tire increase in speed

**The pressure inside a container increases when**- the number of gas molecules decreases
- the temperature is decreased
- the number of gas molecules increases
- when the volume increases and temperature decreases

**To correct for the partial pressure of water vapor, the vapor pressure of H**_{2}0 at the collecting temperature is- divided by 22.4
- subtracted from the total pressure
- multiplied by 22.4
- added to the total gas pressure

**If you want to study the relationship between temperature and pressure of a gas, which factor must be held constant?**- volume
- kinetic energy
- fluidity
- elasticity

**The normal respiratory rate for a human being is 15.0 breaths per minute. The averge volume of air for each breath is 505 cm**^{3}at 20°C and 9.95 X 10^{4}Pa. What is the volume of air at STP that an individual breathes in one day (in cubic meters).- 9.98 m
^{3} - 1.02 m
^{3} - 485 m
^{3} - 166 m
^{3}

- 9.98 m
**Which of the following is NOT standard pressure?**- 760 torr
- 1 atm
- 760 mmHg
- 10.3 kPa

**What is STP?**- 0 K and 760 mm Hg
- 273 K and 101.3 kPa
- 273°C and 760 torr
- 0°C and 760 atm