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Find the charge required to flow through...

Find the charge required to flow through an electrolyte to liberate one atom of (a) a monovalent material and (b) a divalent material.

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The correct Answer is:
A, B, C
(a) 1 equivalent mass of the substance requires 96500 coulombs.
Since the element is diatomic, thus equivalent `mass =` mol Mass
`= 6.023 xx 10^(23)` atoms require 96500 C`,
` atoms require `(96500)/(6.023 xx 10^(23)) C`
`= 1.6 xx 10^(-19) C`.
(b) Since the element is diatomic equivalent mass.
`= 1/2` mol. mass
`= 1/2 xx 6.023 xx 10^(23)` atoms require `56500 C`
`rArr 1` atom requires `= 1.6 xx 2 xx 10^(-19) C`
`= 3.2 xx 10^(-19) C`
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