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Air contains23%oxygenand77%nitrogen by weight the percentage of oxygen in volume is???
Air contains23%oxygenand77%nitrogen by weight the percentage  of oxygen in volume is???

```
2 years ago

Arun
25768 Points
```							Assume that the calculations are for 100 g of air:-Mass of oxygen (O₂) in 100 g of air = 23 gMass of nitrogen (N₂) in 100 g of air = 77 gMolar mass of Oxygen = 32 g1 mole of oxygen or 32 g of Oxygen occupies 22.4 L volume. Therefore, volume of 23 g of oxygen will occupy 22.4/32 x 23 = 16.1 LSimilarly, 28 g of Nitrogen occupies 22.4 L volume. Therefore, 77 g of Nitrogen will occupy 22.4/28 x 77 = 61.6 LTotal volume of air = 16.1 + 61.6 = 77.7 L% by volume of Oxygen = 16.1/77.7 x 100 = 20.7 %
```
2 years ago
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