`CuS + NO_(3)^(-) + H^(+)= Cu^(2+) + S_(8) + NO + H_(2) O `

Explanation

To balance the redox reaction given by the equation:

\[ \text{CuS} + \text{NO}_3^{-} + \text{H}^{+} \rightarrow \text{Cu}^{2+} + \text{S}_8 + \text{NO} + \text{H}_2\text{O} \]

we will follow these steps:

### Step 1: Assign Oxidation States
- In CuS, Cu is in the +1 oxidation state and S is in the -2 oxidation state.
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