What is the charge required for the reduction of two moles of $Cu^{2+}$ to $Cu$?

How many faradays of electricity is required to produce $4.8 \ g$ of $Mg$ at cathode in the electrolysis of molten $MgCl_2$ (in $F$)? (Molar mass of $Mg = 24 \ g/mol$)

The approximate time duration in hours to electroplate $30 \ g$ of calcium from molten calcium chloride using a current of $5 \ A$ is [At. mass of $Ca=40$]

How many coulombs are required for the oxidation of $2 \, mol$ of $H_2O_2$ to $O_2$?

The $E.C.E.$ of $Cu$ and $Ag$ are $7 \times 10^{-6} \ g/C$ and $1.2 \times 10^{-6} \ g/C$ respectively. If a certain current deposits $14 \ g$ of $Cu$,the amount of $Ag$ deposited is .............. $g$.

The quantity of electricity (in $C$) required to oxidize $1 \ mol$ of $H_2O$ to $O_2$ is approximately ..................... $\times 10^5 \ C$.