The irreversible gas-phase reaction A+BC+D is carried out in an isothermal packed bed reactor. The feed is equimolar, with CA0=CB0=2mol/L. The initial volumetric flow rate is 4 L/s. The reaction is first order with respect to A and first order with respect to B, and the rate constant is 0.01L2kg1mol1s1. The pressure drop parameter, a, is 0.0015kg1. If 400kg of catalyst are used in the reactor, what is the percent conversion of A, expressed to one decimal place