Complete and balance the following equations:
`CuS+2H_2SO_4+….to2CuSO_4+2H_2O+S`

Explanation

To complete and balance the equation `CuS + 2H2SO4 + ... → 2CuSO4 + 2H2O + S`, we will follow these steps:

### Step 1: Write the unbalanced equation
The unbalanced equation is:
\[ \text{CuS} + 2 \text{H}_2\text{SO}_4 + ? \rightarrow 2 \text{CuSO}_4 + 2 \text{H}_2\text{O} + \text{S} \]

### Step 2: Identify the reactants and products
We have:
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