The purification of hydrogen gas is possible by diffusion through a thin palladium sheet. Calculate the number of kilograms of hydrogen that pass per hour through a 1.7-mm-thick sheet of palladium baving an area of 0.55m2 at 500C. Assume a diffusion coefficient of 7.8 108m2/s, that the concentrations at the high-and low-pressure sides of the plates are 3.0 and 0.47kg/m3 of hydrogen per cubic meter of palladium, and that steady-state conditions have been attained, M= kg/h