Illustrate how copper metal can give different products on reaction with `HNO_(3)`.

Explanation

To illustrate how copper metal can give different products on reaction with HNO₃ (nitric acid), we can analyze the reactions based on the concentration of nitric acid and the conditions under which the reaction occurs.

### Step-by-Step Solution:

1. **Identify the Reactants**:
- The reactant is copper metal (Cu).
- The reagent is nitric acid (HNO₃), which can be either dilute or concentrated.

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