Name the following chemicals:
Used for absorbing oxygen from the air.

Explanation

To answer the question "Name the following chemicals: Used for absorbing oxygen from the air," we can follow these steps:

### Step-by-Step Solution:

1. **Understanding the Purpose**: The chemical we are looking for is used to absorb oxygen from the air. This is often done in experiments to demonstrate the necessity of oxygen for processes like respiration.

2. **Context of Use**: This chemical is particularly useful in experiments involving germinating seeds, which do not perform photosynthesis and rely solely on respiration for energy.

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