How much O2 can be obtained from 90 kg of water ?
Correct answer: B. 80 kg
- A. 32 kg
- B. 80 kg
- C. 64 kg
- D. 90 kg
Explanation
Water contains 32 kg of oxygen per 36 kg of H2O by mass, or an oxygen mass fraction of 8/9. Therefore, 90 × 8/9 = 80 kg of O2 can be obtained.
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