Question: HELP ASAP! A metal sheet, 2 mm thick, has been exposed to nitrogen gas at 1473 K at the flux of 1.2 x 10-6 kg/m2-s.

HELP ASAP!

A metal sheet, 2 mm thick, has been exposed to nitrogen gas at 1473 K at the flux of 1.2 x 10-6 kg/m2-s. The higher-pressure side has a concentration of 4 kg/m3. How far, in mm, from the high-pressure side will the concentration be 1 kg/m3? Assume a constant of 6 x 10-10 m2/s.

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