Oxygen Molecules Are 16 Times More Massive Than Hydrogen Molecules

Multiple Choice

Oxygen molecules are 16 times more massive than hydrogen molecules. At a given temperature, how do their average molecular speeds compare? The oxygen molecules are moving

A) at 1/4 the speed.
B) 16 times faster.
C) 4 times faster.
D) the same as the hydrogen molecules.
E) at 1/16 the speed.