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How long a current of 3amp has to be pas...

How long a current of 3amp has to be passed through a solution of `AgNO_3` to coat a metal surface of `80cm^(2)` with `0.005mm` thick layer. Density of silver is `10g//cm^(3)` and atomic weight = `108g//"mole"`.

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Mass of silver = density `xx` volume
`m= 10xx80xx0.005xx10^(-1)=0.4g`
`=(Eit)/(F)`
=t = (mF)/(Ei) = (0.4xx96500)/(108xx3) = 119sec`.
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