Electrolysis and redox. problem?

Question

How many grams of Mg metal can be produced in 3.00 h using a current of 47.0 amps to electrolyze molten magnesium chloride?

Answer 1

A current of 47.0 amps for 3.00 h is (47*3*3600) C (coulomb). Oxidation number of Mg++ is 2. Thus (47*3*3600)/(2*96485) is the number of Mole of Mg can be produced. The atomic mass of Mg is 24.305g. Hence the answer is: 24.305g x (47*3*3600)/(2*96485) = 63.9 g