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Gas A in a mixture diffuses through a thick film, having a thickness of 5 mm. A gas has a reaction of A 2B at

Gas A in a mixture diffuses through a thick film, having a thickness of 5 mm. A gas has a reaction of A 2B at the surface. Partial pressure of A gas is 7.8 kN/m2. If diffusivity is 2.5x10-5 m2/s, determine the molar flux of A at 101.3 kPa and 300 K.

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