A mixture of \( \mathrm{C}_{2} \mathrm{H}_{4}(\mathrm{~g}) \) and \( \mathrm{C}_{3} \mathrm{H}_{...

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A mixture of \( \mathrm{C}_{2} \mathrm{H}_{4}(\mathrm{~g}) \) and \( \mathrm{C}_{3} \mathrm{H}_{8}(\mathrm{~g}) \) was kept in a \( 0.820-\mathrm{L} \) vessel at \( 1 \mathrm{~atm} \) and \( 300 \mathrm{~K} \). The weight of the gas mixture in the vessel is \( 0.613 \mathrm{~g} \). Calculate the ratio of the numbers of moles of \( \mathrm{C}_{3} \mathrm{H}_{8}(\mathrm{~g}) \) and \( \mathrm{C}_{2} \mathrm{H}_{4}(\mathrm{~g}) \).
(A) \( 1.54 \)
(B) \( 1.68 \)
(C) \( 1.44 \)
(D) \( 1.60 \)
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