At what temperature hydrogen has the same RMS velocity as that of oxygen at room temperature?

Explanation

RMS velocity(C) is given as `C=sqrt((3RT)/( M))`
For two gases, RMS velocity is same.
`(T_1 )/(M_1) = (T_2)/(M_2)`
`T_1 =` temperature of oxygen `=298 K`
`T_2 =` Temperature of hydrogen =?
temperature of hydrogen gas `=T_2`
` =(T_1)/(M_1) xx M_2 = ( 298 xx 2)/( 32 )`
`= 18.6 K = -254.4^@ C`