Complete the reaction:
CuO + _____ → Cu + H2O

Explanation

To complete the reaction CuO + _____ → Cu + H2O, we need to identify the missing reactant that will react with copper oxide (CuO) to produce copper (Cu) and water (H2O).

### Step-by-Step Solution:

1. **Identify the Reactants and Products**:
- We have copper oxide (CuO) as one reactant.
- The products of the reaction are copper (Cu) and water (H2O).

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