If $N_2, O_2, H_2$,and $He$ are filled separately in four car tubes at the same pressure,which gas will fill first?

The kinetic energy in $J$ of $1$ mole of $N_2$ at $27^{\circ} C$ is: $\left( R = 8.314 \ J \ mol^{-1} \ K^{-1} \right)$

Given that the atomic weights of carbon,nitrogen,and oxygen are $12$,$14$,and $16$ respectively,which of the following pairs of gases will diffuse at the same rate?

What is the average kinetic energy per molecule of an ideal gas in $SI$ units at $25 \, ^\circ C$?

According to the kinetic theory of gases,which of the following statements are correct?
$A$. Collisions are always elastic.
$B$. Heavier molecules transfer more momentum to the wall of the container.
$C$. Only a small number of molecules have very high velocity.
$D$. Between collisions,the molecules move in straight lines with constant velocities.

If a gas expands at constant temperature,it indicates that