[单选题]
Oxygen molecules are 16 times more mas( aq4s 8d /:b -rvabx2uqwkhjt-4s) qosive t6mmhx2sc ua(. han hydrogen molecules. At a given temperature, how do their average molecular speeds cah6 c2.umx(s mompare? The oxygen molecules are moving
A. 4 times faster.
B. at 1/4 the speed.
C. 16 times faster.
D. at 1/16 the speed.
