What is the valency ofnitrogen in ammonia? What is CAN? How is it useful?

Explanation

### Step-by-Step Solution:

1. **Understanding Ammonia**:
- Ammonia is a chemical compound with the formula NH₃. It consists of one nitrogen atom (N) and three hydrogen atoms (H).

2. **Determining the Valency of Nitrogen in Ammonia**:
- In ammonia (NH₃), the oxidation state of hydrogen (H) is +1. Since there are three hydrogen atoms, the total positive charge contributed by hydrogen is:
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