At which set of conditions listed below will the molecules be moving fastest?

Name: At which set of conditions listed below will the molecules be moving fastest?
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Question

Quizplus · Accepted Answer

The speed of molecules is directly proportional to the temperature and inversely proportional to the mass of the molecules. Ne has a lower atomic mass than Ar, so at the same temperature, Ne molecules will move faster than Ar molecules. Therefore, Ne at 100°C will have the fastest-moving molecules.

At Which Set of Conditions Listed Below Will the Molecules