(i) Assuming the density of water to be `1g//cm^(3)`, calculate the volume occupied by one molecule of water.
(ii) Assuming the water molecule to be spherical, calculate the diameter of the water molecule.
(iii) Assuming the oxygen atom occupied half of the volume occupied by the water molecule, calculate approximately the diameter of the oxygen atom.

Explanation

Let's solve the problem step by step.

### Part (i): Calculate the volume occupied by one molecule of water.

1. **Given Data**:
- Density of water = 1 g/cm³
- Molar mass of water (H₂O) = 18 g/mol

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