A gas mixture of \( 3.0 \mathrm{~L} \) of propane and butane on complete combustion at \( 27^{\c....

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A gas mixture of \( 3.0 \mathrm{~L} \) of propane and butane on
\( \mathrm{P} \)
complete combustion at \( 27^{\circ} \mathrm{C} \) produced \( 10.0 \mathrm{~L} \) of \( \mathrm{CO}_{2} \), find out the percentage of the propane in gas mixture?
(1) \( 66.7 \% \)
(2) \( 33.3 \% \)
(3) \( 50 \% \)
(4) \( 75 \% \)


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