Imagine that hydrogen molecules (#H_2#) and oxygen molecules (#O_2#) decided to have a race. if the temperature was the same for both gases, which gas would win the race? Why?
What are the odds....? I would put my money on the dihydrogen molecule.
The dihydrogen molecule should win the face handily.
Kinetic molecular theory establishes that the root mean square velocity of a gaseous particle is given by.....
Note that this principle can be exploited practically in the separation of isotopic gases, according to their differential speeds.