The correct statements among the following is:

The amount of electricity or charge required for reduction or oxidation reactions depends on the stoichiometry for electrode reaction. 1 mole of electron is required to reduce one mole of silver ions. 

Every one mole of calcium two plus ions reacts with two moles of electrons.

${\mathrm{Ca}}^{2+}+2{\mathrm{e}}^{-}\to \mathrm{Ca}$

In commercial production of metals, current as high as 50,000 amperes are used that amounts to about 0.518 F per second.