`KO_(2)` ( potassium super oxide ) is used in space and submarines because it `:`

Options

A. Absorbs `CO_2` and increases `O_2` contents
B. Eliminates moisture and increases CO contents
C. Absorbs `CO_2` only
D. Products ozone

Explanation

To solve the question about why potassium superoxide (KO₂) is used in space and submarines, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding the Role of KO₂**:
- KO₂ (potassium superoxide) is a chemical compound that plays a crucial role in maintaining the atmosphere in enclosed environments like submarines and spacecraft.

2. **Chemical Reaction**:
- The primary function of KO₂ in these environments is to absorb carbon dioxide (CO₂) and release oxygen (O₂). The relevant chemical reaction is:
\[ 4 \, \text{KO}_2 + 2 \, \text{CO}_2 \rightarrow 2 \, \text{K}_2\text{CO}_3 + 3 \, \text{O}_2 \]
- In this reaction, potassium superoxide reacts with carbon dioxide to produce potassium carbonate (K₂CO₃) and oxygen.

3. **Balancing the Reaction**:
- The reaction is balanced, indicating that for every 4 moles of KO₂, 2 moles of CO₂ are consumed, and 3 moles of O₂ are produced. This shows that KO₂ not only absorbs CO₂ but also increases the O₂ content in the environment.

4. **Conclusion**:
- Therefore, the correct answer to the question is that KO₂ is used in space and submarines because it absorbs CO₂ and increases the O₂ content.

### Final Answer:
KO₂ (potassium superoxide) is used in space and submarines because it absorbs CO₂ and increases O₂ content.

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