Equal volumes of two gases A and B diffuse through a porous pot in 20 and seconds respectvely.If the molar mass of A is 80, calculate the molar mass of B.

Equal volumes of two gases A and B diffuse through a porous pot in 20

1.	Equal volumes of two gases A and B diffuse through a porous pot in 20 and seconds respectvely.If the molar mass of A is 80, calculate the molar mass of B.
Answer» Solution :SUPPOSE the volume of each gas diffused =u c c. Then by Graham's law of DIFFUSION, `(r_(A))/(r_(B))=(v//20)/(v//20)=sqrt((M_(B))/(M_(A)))"or"(1)/(2)=sqrt((M_(B))/(80))"or"M_(B)=20 g mol^(-1)`