What is the conjugate acid of `NH_(3)`?

Options

A. `NH_(3)`
B. `NH_(4)^(+)`
C. `N_(2)H_(4)`
D. `NH_(2)OH`

Explanation

To find the conjugate acid of \( NH_3 \) (ammonia), we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Concept of Conjugate Acids and Bases**:
- According to the Bronsted-Lowry theory, an acid is defined as a substance that can donate a proton (H⁺), while a base is a substance that can accept a proton. The conjugate acid is formed when a base accepts a proton.

2. **Identify the Base**:
- In this case, the base is \( NH_3 \) (ammonia).

3. **Add a Proton (H⁺) to the Base**:
- To find the conjugate acid of \( NH_3 \), we need to add a proton (H⁺) to it:
\[ NH_3 + H^+ \rightarrow NH_4^+ \]

4. **Determine the Resulting Species**:
- The addition of a proton to \( NH_3 \) results in \( NH_4^+ \) (ammonium ion).

5. **Conclusion**:
- Therefore, the conjugate acid of \( NH_3 \) is \( NH_4^+ \).

### Final Answer:
The conjugate acid of \( NH_3 \) is \( NH_4^+ \).

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