Kinetic Theory of Gases

A flask contains argon and chlorine in the ratio 2:1 by mass. The temperature of the mixture is 27 C. The ratio of root mean square speed of the molecules of the two gases (v_rms(Ar)/v_rms(Cl)) is: (Atomic mass of argon = 40.0 u and molecular mass of chlorine = 70.0 u)