Question

Which pair of gases have same rate of diffusion at STP?

Answer 1

Answer:

It is given confusing in question about mol. formula.

Explanation:

By the Graham's Law of diffusion, the rate of diffusion of any gas is inversely proportional to the square root of Molar mass of that gas.

Let Molar mass of Hydrocarbon be M and that of Hydrogen be m.

Let rate of diffusion of Hydrocarbon be R and that of Hydrogen be r.