How may ATP are required for formation of one `NH_(3)` in biological nitrogen fixation.

Answer

To determine how many ATP molecules are required for the formation of one NH₃ molecule in biological nitrogen fixation, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Process of Biological Nitrogen Fixation**:
- Biological nitrogen fixation is a process where nitrogen gas (N₂) is converted into ammonia (NH₃) by certain microorganisms. This process is essential for making nitrogen available to plants.

2. **Identify the Reactants and Products**:
- The main reactants in this process are nitrogen gas (N₂), protons (H⁺), and electrons (e⁻). The main product is ammonia (NH₃).

3. **Determine the ATP Requirement for the Reaction**:
- According to the information provided, the conversion of 1 mole of nitrogen gas (N₂) requires 16 molecules of ATP to produce 2 moles of ammonia (NH₃).

4. **Calculate ATP Requirement for One Mole of NH₃**:
- Since 16 ATP are required to produce 2 moles of NH₃, we can find the ATP required for 1 mole of NH₃ by dividing the total ATP by 2.
- Therefore, \( \frac{16 \text{ ATP}}{2} = 8 \text{ ATP} \).

5. **Conclusion**:
- Thus, the formation of one mole of ammonia (NH₃) in biological nitrogen fixation requires 8 ATP molecules.

### Final Answer:
**8 ATP are required for the formation of one NH₃ in biological nitrogen fixation.**

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