Dry air required to burn 1 kg of carbon completely may be around ______________ kg?
Correct answer: A. 11
- A. 11
- B. 2
- C. 20
- D. 38
Explanation
Burning 1 kg of carbon requires 32/12 = 2.67 kg of oxygen. Since air contains about 23% oxygen by mass, the theoretical dry-air requirement is 2.67/0.23, or approximately 11.5 kg.
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