Calculate (i) number of molecules present in 2.24 `dm^3` of carbon dioxide at N.T.P.
(ii) mass of an atom of oxygen
(iii) number of oxygen atoms in 2 mol of ozone
(iv) volume occupied by 4.4 g of `SO_(2)` at N.T.P.

Explanation

Let's solve the question step by step.

### (i) Number of molecules present in 2.24 dm³ of carbon dioxide at N.T.P.

1. **Understand the volume at N.T.P.**: At Normal Temperature and Pressure (N.T.P.), 1 mole of any gas occupies 22.4 liters (or 22.4 dm³).

2. **Convert volume to moles**:
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