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Calculate the emf of the cell at 298 K ...

Calculate the emf of the cell at 298 K
`Sn_((s))|Sn^(2+)(0.05M)||H_((aq))^(+)(0.02M) |H_(2)` 1 atm. Pt
Given that `E_(sn^(2+)//Sn)^(0)=-0.144V`

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