Find out number ionic compound(s0 which is/are water insoluble at room temperature
`BaSO_(4)," "AgNO_(3)," "PbCO_(3)," "CaCl_(2)," "Mg(OH)_(2)," "KMnO_(4)," "CH_(3)COOAg," "Ca_(3)(PO_(4))_(2)," "(NH_(4))_(2)S`

Explanation

To determine the number of ionic compounds that are water insoluble at room temperature from the given list, we will analyze each compound one by one based on their solubility rules.

### Step-by-Step Solution:

1. **Identify the Compounds**:
The compounds given are:
- BaSO₄
- AgNO₃
- PbCO₃
- CaCl₂
- Mg(OH)₂
- KMnO₄
- CH₃COOAg
- Ca₃(PO₄)₂
- (NH₄)₂S

2. **Analyze Each Compound for Solubility**:
- **BaSO₄ (Barium Sulfate)**: Insoluble in water. (1)
- **AgNO₃ (Silver Nitrate)**: Soluble in water. (0)
- **PbCO₃ (Lead Carbonate)**: Insoluble in water. (2)
- **CaCl₂ (Calcium Chloride)**: Soluble in water. (0)
- **Mg(OH)₂ (Magnesium Hydroxide)**: Insoluble in water. (3)
- **KMnO₄ (Potassium Permanganate)**: Soluble in water. (0)
- **CH₃COOAg (Silver Acetate)**: Insoluble in water. (4)
- **Ca₃(PO₄)₂ (Calcium Phosphate)**: Insoluble in water. (5)
- **(NH₄)₂S (Ammonium Sulfide)**: Soluble in water. (0)

3. **Count the Insoluble Compounds**:
From the analysis:
- BaSO₄: Insoluble (1)
- PbCO₃: Insoluble (2)
- Mg(OH)₂: Insoluble (3)
- CH₃COOAg: Insoluble (4)
- Ca₃(PO₄)₂: Insoluble (5)

Total number of insoluble compounds = 5.

### Final Answer:
The number of ionic compounds that are water insoluble at room temperature is **5**.

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