Find value of `X` if `36.6 gm BaCl_(2).XH_(2)O` on strong heating loses `5.4g` moisture ?
[At mass `Ba = 137 Cl = 35.5]` .

Explanation

To find the value of `X` in the compound `BaCl2.XH2O`, we need to follow these steps:

### Step 1: Determine the Molecular Weight of BaCl2
- The atomic mass of barium (Ba) is 137 g/mol.
- The atomic mass of chlorine (Cl) is 35.5 g/mol, and since there are 2 chlorine atoms in barium chloride, we multiply by 2.

\[
\text{Molecular weight of } BaCl_2 = 137 + (35.5 \times 2) = 137 + 71 = 208 \text{ g/mol}
...