The rate of dimension of a gas inversely proportional to the square root of its molecular mass or its density, which is Graham's Law of diffusion of gas.
R ∝ \(\frac{1}{\sqrt{Mm}}\) or R ∝ \(\frac{1}{\sqrt{D}}\)
Dx = 0.5gdm^-3, Dy = 2gdm^-3
R= \(\frac{K}{\sqrt{D}}\)
R\(\sqrt{D}\) = k
R₁\(\sqrt{D_1}\) = R₁\(\sqrt{D_2}\)
R_x\(\sqrt{D_x}\) = R_y\(\sqrt{D_y}\)
\(\frac{R_x}{R_y}\) = \(\frac{\sqrt{D_y}}{\sqrt{D_x}}\)
= \(\frac{\sqrt{2}}{\sqrt{0.5}}\)
= 2.0