(introduction course of university physics)[/B]
A 5.0- liter gas tank holds 1.7 moles of monatomic helium (He) and 1.10 mole of diatomic oxygen
(O2), at a temperature of 260 K. The ATOMIC masses of helium and oxygen are 4.0 g/mol and
16.0 g/mol, respectively. What is the ratio of the root- mean- square (thermal) speed of helium to
that of oxygen?
V(rms) = sqrt(3kT/m)
The Attempt at a Solution
This is the only equation I found from my book about rms speed of gas, but the variables seems unrelated at all. I have no idea on how to do it.
Please tell me how to deal with it in a more detail way.
Thank you very much.