The density of water is `1000 kg m^(-3)`. The density of water vapour at `100^(@) C` and 1 atmospheric pressure is `0.6 kg m^(-3)`. The volume of a molecule multiplied by the total number gives what is called, molecular volume. Estimate the ratio (or fraction) of the molecular volume to the total volume occupied by the water vapour under the above conditions of temperature and pressure.

Explanation

To solve the problem of estimating the ratio of the molecular volume to the total volume occupied by water vapor at 100°C and 1 atmospheric pressure, we will follow these steps:

### Step 1: Understand the Definitions
- **Molecular Volume**: This is the volume occupied by a certain number of molecules, which can be calculated as the volume of one molecule multiplied by the total number of molecules.
- **Total Volume**: This is the volume occupied by the water vapor in the container.

### Step 2: Given Data
- Density of water, \( \rho_w = 1000 \, \text{kg/m}^3 \)
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