The density of water is 1000kgm−3. The density of water vapour at 100∘C and 1 atmospheric pressure is 0.6kgm−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, we will follow these steps:

### Step 1: Understand the Definitions
We need to find the ratio of molecular volume to the total volume occupied by water vapor. Molecular volume is defined as the volume of a single molecule multiplied by the total number of molecules.

### Step 2: Identify Given Data
- Density of water, \( \rho_w = 1000 \, \text{kg/m}^3 \)
- Density of water vapor, \( \rho_v = 0.6 \, \text{kg/m}^3 \)
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