Find the rms speed of the molecules of a sample of n2 (diatomic nitrogen) gas at a temperature of 34.3°c.

Root mean  speed(rms)  is  the  measure  of  the  speed  of  the particle  in  a  gas. it   is  square  root  of  the  velocity squared  of  the  molecules  in  a  gas.
that   is rms=  square  root of ( 3RT/M)
R=  gas  constant(8.314)
T=temperature
M=mass(0.028kg)
rms  is   therefore square  root  of [ 3x  8.314 x(34.3+273)] /0.028kg
     rms =523.20m/s

Ido not understand.