Exercises States of Matter—Gases

Exactly 4.0 g of helium gas, He, is placed into a container at constant temperature and pressure. Next to the container of helium is a 28.0 g sample of nitrogen gas, N2, placed in an identical container at the same temperature and pressure as the helium. From the list of statements below, select all that are TRUE  

The average kinetic energy of the He atoms is the same as the average kinetic energy of the nitrogen molecules. 

A sample of helium gas is collected in a container with a tiny hole in it. The helium gas (M = 4 grams) effuses at a rate of 0.2 moles per minute. If a sample of methane gas (M 16 grams) is allowed to effuse under the same conditions, the rate of CH4 effusion will be 

50 moles of hydrogen gas, H2, and heated it in a 10.00 L container to a temperature of 300 K, how much pressure would the H2 exert on 

00 moles of nitrogen gas, N2, and an unknown amount of hydrogen gas, H2, are mixed together in a container. The total pressure in the container is 1000 mm Hg. If the partial pressure of nitrogen in the container is 750 mm Hg, how many moles of hydrogen gas must 

---