The kinetic energy of $4 \ mol$ of $N_2$ gas at $127 \ ^oC$ is ............. $cal$.

At $STP$,$0.5 \ mol$ of $H_2$ gas and $1 \ mol$ of $He$ gas:

The transport of matter in the absence of bulk flow is known as:

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

One mole of oxygen at $273 \ K$ and one mole of sulphur dioxide at $546 \ K$ are taken in two separate containers,then:

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.