Hydrogen percentage (by weight) in crude petroleum may be about __________________?
Correct answer: B. 15
- A. 5
- B. 15
- C. 25
- D. 35
Explanation
Crude petroleum commonly contains about 10 to 15 percent hydrogen by mass, with the remainder consisting mainly of carbon plus smaller amounts of sulphur, nitrogen, oxygen, and metals. Thus 15 percent is the closest option.
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