Write the Nernst equation and calculate the e.m.f. of the following cell at 298 K :
`Cu(s) | Cu^(2+) (0.130 M) || Ag^(+) (1.0 xx 10^(-4) M) | Ag (s)`
Given : `E_((Cu^(2+) | Cu))^(Theta) = + 0.34 V` and `E_((Ag^(+) |Ag))^(Theta) = + 0.80` V

Explanation

To solve the problem, we will follow these steps:

### Step 1: Write the Nernst Equation
The Nernst equation is given by:
\[ E = E^\circ - \frac{RT}{nF} \ln Q \]
At 298 K, this simplifies to:
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