State the Grahams law of diffusion. The molar masses of gases W and X through a porous material is 12cm³ s⁻¹. Calculate

Part (a):
Graham's law of diffusion states that, at the same temperature and pressure, the rate of diffusion of a gas is inversely proportional to the square root of its molar mass.

$$r \propto \frac{1}{\sqrt{M}}$$

or, for two gases,

$$$$