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 5.2-mm-thick sheet of palladium having an area of 0.70m2 at 500C. Assume a diffusion coefficient of 6.9108m2/s, that the concentrations at the high- and low-pressure sides of the plates are 2.8 and 0.71kg/m3 of hydrogen per cubic meter of palladium, and that steady-state conditions have been attained. M=kg/h