21. Kinetic Theory of Ideal Gases

What is the root mean square velocity of a nitrogen molecule ($N_2$) at temperature $T$ in terms of the Boltzmann constant $k$ and the mass of the molecule $m$?

What is the temperature of a sample of CO₂ molecules whose rms speed is 300 m/s? The molecular mass for Carbon and Oxygen is 12.01 g/mol and 16 g/mol, respectively.