Wow. Can anyone please tell me how to approach this problem? For a science experiment you need to electroplate zinc onto both sides of a very thin, 1.00 1.00 copper sheet. You want the zinc thickness to be 140 , and you know that the charge carriers in the ionic solution are divalent (charge ) zinc ions. The density of zinc is 7140 . If the electroplating apparatus operates at 1.40 , how long will it take the zinc to reach the desired thickness?