The reaction of calcium cyanamide with water yields

Options

A. `Ca(OH)_(2) and N_(2)`
B. `CaC_(2) and N_(2)H_(4)`
C. `Ca(HCO_(3))_(2) and NH_(3)`
D. `CaCO_(3) and NH_(4)OH`

Answer

To solve the question regarding the reaction of calcium cyanamide with water, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Reactants**:
The reactants in this reaction are calcium cyanamide (CaCN₂) and water (H₂O).

2. **Write the Balanced Chemical Equation**:
The reaction of calcium cyanamide with water can be represented as:
\[ \text{CaCN}_2 + 3 \text{H}_2\text{O} \rightarrow 2 \text{NH}_3 + \text{CaCO}_3 \]
In this reaction, calcium cyanamide reacts with three molecules of water.

3. **Identify the Products**:
From the balanced equation, we can see that the products of this reaction are:
- Ammonia (NH₃)
- Calcium carbonate (CaCO₃)

4. **Final Products**:
Additionally, when ammonia (NH₃) dissolves in water, it can form ammonium hydroxide (NH₄OH). Therefore, the complete reaction can also be represented as:
\[ \text{CaCN}_2 + 3 \text{H}_2\text{O} \rightarrow 2 \text{NH}_4\text{OH} + \text{CaCO}_3 \]
However, in terms of the main products formed directly from the reaction, we focus on NH₃ and CaCO₃.

5. **Conclusion**:
The final products of the reaction of calcium cyanamide with water are ammonia (NH₃) and calcium carbonate (CaCO₃).

### Answer:
The reaction of calcium cyanamide with water yields ammonia (NH₃) and calcium carbonate (CaCO₃).