CHEMISTRY: GRAHAM'S LAW WORKSHEET
NAME ________________________
1. Vials of CCl4, NH3, and C6H6 gases are released simultaneously across the room from
you. Which would you smell first? Why? Which would you smell last? Why?
2. The gases shown in the diagram below were released at the same time. Place an X
where you believe the reaction would take place and explain why you chose that spot.
3. The velocity of fluorine gas at 25.00C is 25.0 meters/second. What is the velocity of
chlorine gas at the same temperature?
4. The velocity of NH3 gas is 20.0 meters/second at 75.00C. What is the velocity of oxygen
gas at the same temperature?
5. The velocity of hydrogen gas at 50.00C is 20.0 meters/second. An unknown gas has a
velocity of 10.0 meters/second at the same temperature. What is the molar mass of the
unknown?
1.
If a molecule of neon gas travels at an average of 400 m/s at a given temperature, estimate the
average speed of a molecule of butane gas, C4H10, at the same temperature.
2.
Compare the rates of effusion of helium gas to neon gas.
3.
Compare the rates of effusion of nitrogen monoxide gas to carbon monoxide gas.
4.
Argon effuses 2.36 times as fast as another gaseous element under the same conditions.
Estimate the molar mass of the other element, and determine its probable identity.
5.
At 25C, the average velocity of oxygen molecules is 420 m/s. What is the average velocity of
helium atoms at the same temperature?
Dalton’s Law Worksheet
1)
A metal tank contains three gases: oxygen, helium, and nitrogen. If the partial pressures of the
three gases in the tank are 35 atm of O2, 5 atm of N2, and 25 atm of He, what is the total pressure inside
of the tank?
2)
Blast furnaces give off many unpleasant and unhealthy gases. If the total air pressure is 0.99
atm, the partial pressure of carbon dioxide is 0.05 atm, and the partial pressure of hydrogen sulfide is
0.02 atm, what is the partial pressure of the remaining air?
3)
If the air from problem 2 contains 22% oxygen, what is the partial pressure of oxygen near a
blast furnace?
4)
A 250. mL sample of O2 is collected over H2O at 25oC and 760.0 mm
Hg pressure. What is
o
the pressure of the dry gas alone? (Vapor
pressure of water at 25 C = 23.8 mm Hg)
5)
150 mL of oxygen is collected over water at 19.0oC and 750 torr. If the dry
volume
becomes 100 mL and the pressure becomes 1.00 atm, what will be the new temperature?