Give balanced equations to show the preparation of hydrogen by the following:
nitric acid

Explanation

To prepare hydrogen gas using nitric acid (HNO3), we will use magnesium (Mg) metal and dilute nitric acid. Here’s a step-by-step solution:

### Step 1: Write the unbalanced equation
When magnesium reacts with dilute nitric acid, it produces magnesium nitrate and hydrogen gas. The unbalanced equation is:
\[ \text{Mg} + \text{HNO}_3 \rightarrow \text{Mg(NO}_3\text{)}_2 + \text{H}_2 \]

### Step 2: Identify the products
From the reaction, we know that magnesium nitrate (Mg(NO3)2) and hydrogen gas (H2) are produced.
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