Calculate the effective molecular weight of air 

Explanation

To calculate the effective molecular weight of air, we will follow these steps:

### Step 1: Understand the Composition of Air
Air is primarily composed of nitrogen (N₂) and oxygen (O₂). By volume, air is approximately 79% nitrogen and 21% oxygen.

### Step 2: Determine the Moles of Each Gas
For the calculation, we will consider 1 mole of air. This means:
- Moles of nitrogen (N₂) = 0.79 moles
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