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 $k\frac{g}{h})$ through a $3\mathrm{.}8-mm$ thick sheet of palladium having an area of $0\mathrm{.}25m^2$ at $500C.$ Assume a diffusion

coefficient of $6\mathrm{.}0{10}^{-8}\frac{m^2}{s},$ that the concentrations at the high$-$ and low$-$pressure sides of the plate are $3\mathrm{.}6$ and

of hydrogen per cubic meter of palladium$),$ and that steady$-$state conditions have been attained.

$k\frac{g}{h}$