If the components of air are `N_(2), 78%, O_(2), 21%, Ar, 0-9%` and `CO_(2), 0-1%` by volume, what would be the molecular weight of air?

Explanation

To find the molecular weight of air based on its components, we can follow these steps:

### Step 1: Identify the components and their percentages
The components of air and their respective percentages by volume are:
- Nitrogen (N₂): 78%
- Oxygen (O₂): 21%
- Argon (Ar): 0.9%
- Carbon Dioxide (CO₂): 0.1%
...