A 6.0 g mixture of ethane $\mathrm{C_{2}H_{6}}$ and propene $\mathrm{C_{3}H_{6}}$ is burnt in excess oxygen. The combustion produces $18.0$ g of $\mathrm{CO_{2}}$ and $9.8$ g of $\mathrm{H_{2}O}$. Determine the mass percent of each hydrocarbon in the original mixture.

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Ethane 66.7 % (≈4.0 g), Propene 33.3 % (≈2.0 g)

Neco Model Questions Vol1 2020 Chemistry Question 21

A 6.0 g mixture of ethane \(\mathrm{C_{2}H_{6}}\) and propene \(\mathrm{C_{3}H_{6}}\) is burnt in excess oxygen. The combustion produces \(18.0\) g of \(\mathrm{CO_{2}}\) and \(9.8\) g of \(\mathrm{H_{2}O}\). Determine the mass percent of each hydrocarbon in the original mixture.

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