Chapter 19, Problem 63E

How many gram of metal are deposited at the cathode by the passage of 2.15 A of current for 75 min in the electrolysis of an aqueous solution containing (a) $Z{n}^{2+}$ ; (b) $A{l}^{2+}$ ; (c) ${\text{Ag}}^{\text{4+}}$ ; (d) ${\text{Ni}}^{2+}$ ?