In a mixture of hydrogen gas, oxygen gas, and nitrogen gas, the molecules with the greatest average speed are those of

Question

Quizplus · Accepted Answer

The average speed of gas molecules is directly proportional to the square root of its molecular weight. Therefore, hydrogen with the lowest molecular weight would have the greatest average speed. Oxygen and nitrogen have higher molecular weights than hydrogen and would have slower average speeds.

In a Mixture of Hydrogen Gas, Oxygen Gas, and Nitrogen