Gas A and B are contained in a tube at 101.32 kPa pressure and 298.15 K. At one point the partial pressure of A is 80.79 kPa and at a point 0.03 maway, the partial pressure is 30.62 kPa. If the total pressure is constant throughout the tube, calculate the flux of A at steady state for equimolar counter diffusion. The diffusion coefficient is D = 0.230×10 m²/s. a) 3.55×10 kgmol A/m².s b) 2.55x103 kgmol A/m².s c) 1.55×105 kgmol A/m²-s d) 4.55x10 kgmol A/m².s