A cubical box of side `1 m` contains helium gas (atomic weight 4) at a pressure of `100 N//m^2`. During an observation time of `1 second`, an atom travelling with the root - mean - square speed parallel to one of the edges of the cube, was found to make `500 hits` with a particular wall, without any collision with other atoms . Take `R = (25)/3 j //mol - K and k = 1.38 xx 10^-23 J//K`.
(a) Evaluate the temperature of the gas.
(b) Evaluate the average kinetic energy per atom.
( c) Evaluate the total mass of helium gas in the box.

Answer

`160 K,3.3xx10^_21J,0.3gm`