Which gas has molecules with the greatest average molecular speed at 25°C? A)CH₄ B)Kr C)N₂ D)CO₂ E)Ar

Name: Which gas has molecules with the greatest average molecular speed at 25°C? A)CH 4 B)Kr C)N 2 D)CO 2 E)Ar
Brand: Quizplus
Rating: 4.9 (39 reviews)

Question

Quizplus · Accepted Answer

The average molecular speed of a gas is inversely proportional to the square root of its molar mass. CH₄ has the lowest molar mass among the given gases, so it has the greatest average molecular speed at 25°C.

Which Gas Has Molecules with the Greatest Average Molecular Speed