A + B-C + D in gas phase in a packed bed reactor at 300 K (isothermal) with an initial pressure of 10 atm. The feed is equal molar in A and B with CAO = 0.1 mol/L. k = 1.2 L/kg-minute at 300 K. The reaction is second order in A and zero order in B. For a volumetric flow rate 100 L/min and 100 kg of catalysts. 0.057 conversion is achieved. The pressure-drop parameter, a. is a 0.0099 kg , Assume PfPo -0.1 a) What is the mole balance? by What is the rate law? c) What is the stoichiometry? d) What is the pressure drop equation