Hydrogen burns with a pale blue flame producing _____ .

Explanation

To answer the question, "Hydrogen burns with a pale blue flame producing _____," we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Hydrogen Combustion**: When hydrogen gas (H₂) burns, it reacts with oxygen (O₂) from the air. This reaction is known as combustion.

2. **Identifying the Reaction**: The chemical reaction for the combustion of hydrogen can be represented as:
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