$12 \ cm^3$ of $SO_{2(g)}$ diffused through a porous membrane in $1 \ minute$. Under similar conditions $120 \ cm^3$ of another gas diffused in $5 \ minutes$. The molar mass of the gas in $g \ mol^{-1}$ is

Hydrogen gas diffuses $4$ times faster than a mixture of $C_2H_4$ and $CO_2$. Find the molar ratio of $C_2H_4$ and $CO_2$ in the mixture.

Under similar conditions of temperature and pressure,$50 \ mL$ of gas $A$ diffuses through a hole in the same time that $40 \ mL$ of gas $B$ diffuses. If the molar mass of gas $A$ is $64$,what is the molar mass of gas $B$?

$A$ gaseous mixture of $2$ moles of $A$, $3$ moles of $B$, $5$ moles of $C$, and $10$ moles of $D$ is contained in a vessel. Assuming that gases are ideal and the partial pressure of $C$ is $1.5 \ atm$, what is the total pressure (in $atm$)?

When $0.0168 \ mol$ of $O_2$ obtained from the decomposition of $KClO_3$ is collected over water at $25 \ ^oC$,the volume is $428 \ mL$ and the total pressure is $754 \ mm$. What is the aqueous tension (water vapor pressure) at $25 \ ^oC$ in $mm$?

Explain the absolute temperature scale.