Metals react with acids to produce ____ gas.

Explanation

To answer the question "Metals react with acids to produce ____ gas," we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Metals**:
- Metals are naturally occurring materials that have a shiny surface (lustrous), produce a deep sound when struck (sonorous), and are good conductors of heat and electricity.

2. **Understanding Acids**:
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