Chemistry of Environment

Given:

• Volume of oxygen required = 630 dm³
• Percentage of oxygen in air = 21%

Formula:

The volume of air required can be calculated using the proportion of oxygen in the air:
Volume of air = Volume of oxygen / Percentage of oxygen in air
Volume of air = 630 dm³ / 0.21

Calculation:

Volume of air=3000 dm³

Answer:

The minimum volume of clean, dry air needed to provide 630 dm³ of oxygen is 3000 dm³.

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