11.2 `dm^(3)` of a gas at S.T.P. weighs equal to 22 g. Find out its molecular mass .

Explanation

To find the molecular mass of the gas given that 11.2 dm³ weighs 22 g at standard temperature and pressure (STP), we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Volume at STP**:
At STP, 1 mole of any ideal gas occupies 22.4 dm³.

2. **Identify the Given Information**:
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