In copper voltameter 20mg of copper is deposited on the cathode of the voltameter by `0.15-wedge` current in 6minutes 42sec. Calculate (i) amount of electricity required to liberate one gram equivalent of any substance, (ii) charge carried by an electron. (Atomic mass of copper =64l Avogardo constant=`=6.02xx10^(23)"mol"^(-1)` and copper is divalent.)
