The conjugate bas of hydrazoic acid is

Options

A. `HN_(3)^(-)`
B. `H_(2)N_(3)^(-)`
C. `N_(3)^(-)`
D. `N^(3-)`

Explanation

To find the conjugate base of hydrazoic acid (H₃N), we need to follow these steps:

### Step-by-Step Solution:

1. **Identify the Acid**: The given acid is hydrazoic acid, which has the chemical formula H₃N or more commonly represented as HN₃.

2. **Understand Conjugate Bases**: A conjugate base is formed when an acid donates a proton (H⁺). Therefore, to find the conjugate base of hydrazoic acid, we need to remove one hydrogen ion (H⁺) from the acid.

3. **Remove H⁺ from HN₃**:
- Starting with HN₃, when we remove one H⁺ ion, we are left with the species N₃⁻.
- The reaction can be represented as:
\[ \text{HN}_3 \rightarrow \text{N}_3^{-} + \text{H}^{+} \]

4. **Identify the Conjugate Base**: The species N₃⁻ is the conjugate base of hydrazoic acid.

5. **Conclusion**: Therefore, the conjugate base of hydrazoic acid (HN₃) is N₃⁻.

### Final Answer:
The conjugate base of hydrazoic acid is N₃⁻.

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