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How long a current of 3 ampere has to be...

How long a current of 3 ampere has to be passed through a soulution of silver nitrate to coat a metal. Surface of `80cm^(2)` with a 0.005 mm thick layer? Density of Ag is `10.5gcm^(-3)`. At wt. `Ag=108.0u`

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Given, i=3 ampere
Ag=80`xx0.005xx10^(-1)cm^3=0.04cm^3`
`:.` Weight of Ag used`=0.04xx10.5g`
`w_(Ag)=(E.i.t)/(96500)`
`0.04xx10.5=(108xx3xxt)/(96500)`
`:.t=125.09sec`
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