Each Type of Molecule Has the Same Average Kinetic Energy

Each type of molecule has the same average kinetic energy in a planetary atmosphere. As a result (and knowing that an oxygen [O₂] molecule has twice the mass of a methane [CH₄] molecule) , we can say that in this atmosphere the average speed of an oxygen molecule is:

A) 1.4 times less than that of a methane molecule.
B) half that of a methane molecule.
C) twice that of a methane molecule.
D) 1.4 times greater than that of a methane molecule.

Correct Answer:

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