3. A chemical reaction A+B=2C occurs in packed bed reactor (PBR). The rate of reaction is following elementary rate laws. The reaction is carried out isothermally. a. Derive the equation for calculating conversion (X) as a function as weight of catalyst (W). (easy: 2 points) b. Calculate the weight of the catalyst if you want to get 90% conversion. (=0.037kg4. k=12m6/kmol.kgcat.h,C=0.1kmol/dm3,C0=0.2kmol/dm2P0=1013kPa,v0=7.15 m3/h (easy: 2 points)