Question Detail
Question
A 0.500 g sample of a hydrocarbon is combusted to produce 1.500 g CO₂ and 0.767 g H₂O. What is the mass percent of hydrogen in the hydrocarbon?
Correct Answer
Option A is the correct answer.
Detailed Explanation
Mass of H = (2/18) × 0.767 = 0.0852 g. %H = (0.0852/0.500) × 100 = 17.0%.
Hint
All hydrogen in the water came from the hydrocarbon.