What volume of propane is left unreacted when \(20 \mathrm{~cm}^{3}\) of oxygen and \(20 \mathrm{~cm}^{3}\) of propane react according to the following equation?
\(\mathrm{C}_{1} \mathrm{H}_{3}+5 \mathrm{O}_{\text {ue }} \quad 3 \mathrm{CO}_{4 \mathrm{we}}+4 \mathrm{H}_{2} \mathrm{O} \)

A. \(16 \mathrm{~cm}^{\prime} \)
B. \(5 \mathrm{~cm}^{2}\)
C. \(14 \mathrm{~cm}^{2} \)
D. \(15 \mathrm{~cm}^{2}\)  

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Correct Answer: D