Question

12 g of Au has been deposited at the cathode when an aqueous solution of gold nitrate is electrolyzed with 10 A for 30 hours. How many electrons was transferred? Molecular weight of Au= 197

Answer 1

12 g of Au has been deposited at the cathode 

gold nitrate is electrolyzed with 10 A for 30 hours. 

Molecular weight of Au= 197

Therefore.

if 12g took 30 hrs

what about 197g = ( (197) (30))/12

= (5910)/12 = 492.5g