Complete combustion of 1.0 g of a hydrocarbon produced 3.14 g of CO₂. What is the mass percentage of Carbon in the hydrocarbon?
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14.3%
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25.0%
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85.6%
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92.3%
📝 Detailed explanation
Mass of C in CO₂ = 3.14 * (12/44) = 0.856 g.
Since all C comes from the hydrocarbon, %C = (0.856 / 1.0) * 100 = 85.6%.
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