At what temperature will hydrogen molecules have the same root mean square speed as nitrogen molecules at `27^(@)C` ?

At what temperature will the oxygen molecules have the same root mean square speed as hydrogen molecules at 200K

At what temperature will hydrogen molecules have the same kinetic energy as nitrogen molecules have at 35^@C ?

The temperature at which hydrogen molecules will have the same root mean square velocity as oxygen molecules have at 127^(@)C is :

Calculate the root mean square speed of methane molecules at 27^(@)C .