Write the name of gas released when Cu added to dilute `HNO_(3)`

Explanation

To determine the gas released when copper (Cu) is added to dilute nitric acid (HNO₃), we can follow these steps:

### Step 1: Identify the Reactants
We have copper (Cu) and dilute nitric acid (HNO₃) as the reactants.

### Step 2: Write the Reaction
When copper reacts with dilute nitric acid, it forms copper nitrate and releases a gas. The unbalanced chemical equation can be represented as:
\[ \text{Cu} + \text{HNO}_3 \rightarrow \text{Cu(NO}_3\text{)}_2 + \text{NO} + \text{H}_2\text{O} \]
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