reaction engineering

3. A gas-phase, isothermal, catalytic reaction to convert methylamine to dimethylamine, 2CH3NH2 (CH3)2NH + NH3 (or, 2A B+C) is being carried out in a packed bed reactor. Assuming that the reaction follows third order rate law (i.e, -TA = KCA), obtain an expression of ra in terms of conversion and catalyst weight as variables. (6 marks)