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 (in kg/h ) through a 4.5-mm thick sheet of palladium having an area of 0.25m2 at 500C. Assume a diffusion coefficient of 6.0108m2/s, that the concentrations at the high-and low-pressure sides of the plate are 5.4 and 0.94kg/m3 (kilogram of hydrogen per cubic meter of palladium), and that steady-state conditions have been attained. kg/h