How will you calculate the number of moles of electrons actually passed and mass of the substance formed during electrolysis of salt solution using reaction stoichiometry?

Dear User,
The amount of substance formed during electrolysis can be calculated with the help of Faraday's first law of electrolysis. 
w=ZQ
where, w= mass of substance deposited on passing Q coulombs of electricity
           Z= electrochemical equivalent
          Q= amount of electricity passed

The number of moles of electrons can be calculated as
Q=nF
or, n = Q/F
where, n= number of moles of electrons
F= Faraday's constant
Q= amount of elcetricity passed

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