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The potential of the following cell is 0...

The potential of the following cell is 0.34 V at `25^(@)V`. Calculate the standard reduction potential of the copper half-cell .
`Pt| H_(2) ( 1 atm) | H^(+) ( 1M) || Cu^(2+) ( 1M) | Cu`

A

`-3.4 V`

B

`+3.4V`

C

`- 0.34V`

D

`+0.34V`

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