Diffusion is a process in which a gas moves from a region of high concentration to a region of lower concentration. rate of diffusion is inversely proportional to the square root of mass. now, in a container, gas occupies the volume of the container. so gas A and gas B have same volume when placed in the same container. now mass is directly proportional to the density of the gas. so, d1/d2 = (m1/m2)^1/2 = (p1v/p2v)^1/2 = (p1/p2)^1/2 d1, d2 rate of diffusion of gases a and b respectively. similarly, m is the mass of the gas, p is the density of the gas, v is the volume of the gas. Please please mark as brainliest .......