What happens when hydrogen burns in air?

Explanation

**Step-by-Step Text Solution:**

1. **Understanding the Reaction**: When hydrogen burns in air, it reacts with oxygen. This is a combustion reaction where hydrogen (H₂) combines with oxygen (O₂) from the air.

2. **Chemical Equation**: The chemical equation for the combustion of hydrogen can be written as:
\[ 2H_2 + O_2 \rightarrow 2H_2O + \text{Energy} \]
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