Waec Model Questions Vol1 2019 Chemistry Question 25
Practice objective / multiple choice question 25 from the 2019 Waec Model Questions Vol1 Chemistry examination.
A 5.00 g sample of a mixture of the two C₄H₁₀ isomers, n‑butane and isobutane, is burnt completely in excess O₂. The combustion of 1 mol n‑butane releases 2877 kJ of heat, whereas the combustion of 1 mol isobutane releases 2870 kJ. The total heat released by the sample is 247.0 kJ. Determine the mass percent of n‑butane present in the mixture.
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About This Question
This is Waec Model Questions Vol1 2019 Chemistry Question 25. It is a objective / multiple choice question from the 2019 Waec Model Questions Vol1 Chemistry examination.
Difficulty level: Hard .
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