Answer to Question #148558 in General Chemistry for yaz

Question

Find the molar mass of the unknown gas which diffuses

Twice as fast as HI

Answer 1

Molar mass of HI, M₁= 1+127= 128gmol^-1

let the molar mass of the unknown gas X be M₂

Then from Graham's law of diffusion

R_x/R_HI = √(M1/M₂)

2/1 = √(128/M₂)

2²/1² = 128/M₂

4 = 128/M₂

M₂ = 128/4 = 32gmol-1