The density of phosgene $(COCl_2)$ gas at $STP$ is........

What is the $SI$ unit of rate of diffusion for a gas?

The rate of diffusion of a gas having a molar mass of $128 \ g/mol$ with respect to oxygen is ........... times.

Cyclopropane and oxygen at partial pressures $170 \ torr$ and $570 \ torr$ respectively are mixed in a gas cylinder. What is the ratio of the number of moles of cyclopropane to the number of moles of oxygen $(n_{C_3H_6}/n_{O_2})$ ?

At the same temperature and pressure,the rate of diffusion of gas $X$ is $3 \sqrt{3}$ times that of a gaseous hydrocarbon of molar mass $54 \ g \ mol^{-1}$. The molar mass of $X$ in $g \ mol^{-1}$ is

On what factors does the stability of the state of matter depend?