Prove: `r_1/r_2 = sqrt(rho_2/rho_1)` for Graham's law of diffusion.

What do you mean by diffusion of gases ? State Graham's law of diffusion. Give an example of its practical application.

Prove that r_1+r_2+r_3-r=4R

Find the ratio of molecular weight of two gaes when rate of diffusion is 16 times more for the 2nd one. State Grahams law diffusion.

Prove that (r_1+r_2)/(1+cosC)=2R

If r/(r_1)=(r_2)/(r_3), then

A cylindrical block floats vertically in a liquid of density rho_(1) kept in a container such that the fraction of volume of the cylinder inside the liquid is x_(1) . Then some amount of another immiscible liquid of density rho_(2) (rho_(2) lt rho_(1)) is added to the liquid in the container so that the cylinder now floats just fully immersed in the liquids with x_(2) fraction of volume of the cylinder inside the liquid of density rho_(1) . The ratio rho_(1)//rho_(2) will be