The rate of diffusion of a gas is directly proportional to ....

$A$ closed container contains a mixture of non-reacting gases $A$ and $B$. The partial pressures of $A$ and $B$ are $4.5 \ bar$ and $5.5 \ bar$ respectively. Find the mole fractions of $A$ and $B$ respectively.

What is the $SI$ unit of viscosity?

In a flask containing $2 \ g$ of $H_2$ and $32 \ g$ of $SO_2$,the partial pressure of hydrogen is.....

$300 \ mL$ of a gas '$x$' of molar mass $32 \ g \ mol^{-1}$ is effused in $25 \ s$. What volume of methane would effuse in the same time (in $mL$)?

Under identical conditions,the time required for the diffusion of $64 \ mL$ of $H_2$ gas is equal to the time required for the diffusion of which of the following?