Atomic mass of chlorine is 35.5. What is its vapour density?

Explanation

To find the vapor density of chlorine, we can follow these steps:

### Step 1: Understand the relationship between vapor density and molecular mass
The formula for vapor density (VD) is given by:
\[ \text{Vapor Density} = \frac{\text{Molecular Mass of the gas}}{\text{Molecular Mass of Hydrogen}} \]

### Step 2: Identify the molecular mass of hydrogen
The molecular mass of hydrogen (H₂) is approximately 2 g/mol.
...