Question

The vapour density of two gases are in ratio one is 23 the molecular masses of the ratio of

Answer 1

Molecular mass of a substance is proportional to its vapour density.
Therefore,
M1/M2 = V1/V2
(M = Molecular mass, V = Vapour density)
So, M1/M2 = 1/23
Therefore, Ratio of the two gases M1:M2 = 1:23