How many water moleculer(s) is/are presents in compound which is used in borax bead test?

Explanation

To determine how many water molecules are present in the compound used in the borax bead test, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Compound**: The compound used in the borax bead test is borax.

2. **Write the Chemical Formula**: The chemical formula for borax is Na₄B₄O₇·10H₂O.

3. **Analyze the Formula**: In the formula Na₄B₄O₇·10H₂O, the "10H₂O" indicates the number of water molecules associated with the borax compound.

4. **Count the Water Molecules**: From the formula, it is clear that there are 10 water molecules (H₂O) present.

5. **Conclusion**: Therefore, the number of water molecules present in the compound used in the borax bead test is 10.

### Final Answer:
10 water molecules are present in the compound used in the borax bead test.

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