How many coulombs are required in order to reduce 12.3 g of nitrobenzene to aniline?

Moles of nitrobenzene used in the reaction =12.3123=0.1H2 required for reduction = 0.1 x 3 = 0.3 molAmount of charge required to liberate 0.3 mole of hydrogen                                      = 2 x 96500 x 0.3 = 57900 C.