List the different units of gas pressure.

For the diffusion of a gas at pressure $P$,the rate of diffusion is expressed by :

The density of a gas at $STP$ is $2.86 \, g \, L^{-1}$. Which gas is it?

$A$ gaseous mixture contains equal masses of dihydrogen gas,dioxygen gas and methane gas at a total pressure of $380 \ torr$. The partial pressure of methane gas is ........... $torr$.

At higher altitudes,the boiling point of water lowers because:

Show the relationship between different units of pressure.