According to Faraday's first law , W = (ECT) / 96500
Where W = mass of metal deposited = ?
          E =
Equivalent weight of Cu = 63.54 / 2
                                                  Â
= 31.77
          C =
current = 15 mA = 15 x10-3 A
          t =
time taken = 1.0 h
                              Â
= 1.0x60x60 s
                              Â
= 3600 s
Plug the values we get
W = ( 31.77 x 15x10-3 x 3600 ) / 96500
   = 0.018 g
Therefore the mass of copper deposited is 0.018 g
