How many moles of electron needed in Faraday for reduction of 5 moles of `MnO_4^-` (in acidic medium)

How many moles of electrons are required for reduction of 2 moles of Zn^(2+) to Zn ?

How many moles of electrons weigh 1 kg ?

How many moles of electrons are needed for the reduction of 20mL of 0.5M solution of KMnO_(4) in acid mediumgt

How many mole of electrons are involved in the reduction of one mole of MnO_(4)^(-) ion in alkaline medium to MnO_(3)^(-)