The empirical formula of a compound is `CH_(2)O`. If its vapour density is 90, find out the molecular formula of the compound.

Explanation

To find the molecular formula of the compound given its empirical formula and vapor density, we can follow these steps:

### Step 1: Determine the empirical formula mass
The empirical formula is \( CH_2O \). We need to calculate its molar mass.

- Carbon (C) has an atomic mass of 12 g/mol.
- Hydrogen (H) has an atomic mass of 1 g/mol, and there are 2 hydrogen atoms, so \( 2 \times 1 = 2 \) g/mol.
- Oxygen (O) has an atomic mass of 16 g/mol.
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