Gas Laws
Calculations
Random
Conversions
Partial Pressure, Water Displacement, and Effusion Laws
100

What is the name of the following gas law: 

P1/T1=P2/T2

Gay-Lussac's Law

100

At STP what mass of N2 do you have when it occupies 5 L?

PV=nRT

R = 0.08206 L-atm/mol-K

6.25 g of N2

100

What devices measures the pressue of an enclosed gas?

Manometer

100

A pressure of 745 mm Hg equals how many torr?

745 torr

100

What is the partial pressure of oxygen gas collected by water displacement at 25 °C and 782 mm Hg? PH2O = 17.5 mm Hg

Patm = Pgas + PH2O

764.5 mm Hg

200

What is the formula for Boyle's Law?

P1V1 = P2V2

200

If 22.5 L of nitrogen at 748 mm Hg are compressed to 725 mm Hg at constant temperature. What is
the new volume?

23.2 L

200

What device measures atmospheric pressure?

Barometer
200

Convert the pressure 2.75 atm to kPa.

1 atm = 101.325 kPa

278.6 kPa

200

A mixture of four gases exerts a total pressure of 1054 mm Hg. Gases A and B each exert 300 mm Hg. Gas C exerts 163 mm Hg. What pressure is exerted by gas D?

PT = P1 + P2 + P3 + P4

291 mm Hg

300

What is the name of the following law:

V1/n1 = V2/n2

Avogadro's Law

300

Calculate the decrease in temperature when 6.00 L at 20.0 °C is compressed to 4.00 L.

195.3 K

300

One mole of any gas at STP occupies how many liters?

22.4 L

300

Convert the pressure 823 torr to atm.

1.08 atm
300

How many times greater is the rate of effusion of nitrogen gas than that of carbon dioxide gas at the same temperature and pressure?

1.25

400
Give the formula for Charles's Law

V1/T1 = V2/T2

400

A gas balloon has a volume of 106.0 liters when the temperature is 45.0 °C and the pressure is 740.0
mm of mercury. What will its volume be at 20.0 °C and 780 .0 mm of mercury pressure?

93.5 L

400

What determines the average kinetic energy of a gas?

Temperature

400

Convert the pressure 163 Pa to atm.

1 atm = 101325 Pa

0.0016 atm

400

A sample of helium diffuses 6.7 times faster than an unknown gas diffuses. What is the molar mass of the unknown gas?

179.56 g/mol

500
With a constant temperature what happens to the pressure as you decrease the volume?

As volume decreases, pressure increases with constant temperature

500

A diver’s backup oxygen tank reads 900 mmHg while on her boat, where the temperature is 27 C. When she dives down to the bottom of an unexplored methane lake on a recently-discovered moon of
Neptune, the temperature will drop down to –183 C. What will the pressure in her backup tank be at that
temperature?

0.36 atm

500

For reactants or products that are gases, the coefficients in the chemical equation indicate...

The volume

500

Convert 278 kPa to torr

760 torr = 101.325 kPa

2085.2 torr

500

What is the atmospheric pressure if a gas collected has a pressure of 639 torr and the pressure of water is 27.5 torr?

666.5 torr

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