For hydrogen gas, calculate
Root mean square velocity at STP.

Explanation

Given : Molar mass, `M" of "H_(2)= 2.01g mol^(-1)= 2.016 xx 10^(-3) kg mol^(-1), J= kgm^(2)s^(-2)`
RMS velocity, `u_("rms")=((3RT)/(M))^(1/2)=(((3)(8.314JK^(-1)mol^(-1))(273.15K))/(2.016xx 10^(-3)kg mol^(-1)))^(1/2)= 1.84xx 10^(3) ms^(-1)`.