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1. A mixture of C2H6(g) and C3H8(g) in a closed rigid container has a total pressure of 1.0 atm. Just enough O2(g) is added to the mixture to bring about its complete combustion to CO2(g) and H2O(g). After the combustion, the total pressure in the container is 6.3 atm. Assuming constant temperature and volume, find the mole fraction of C3H8(g) in the original mixture.
(A) 0.25
(B) 0.35
(C) 0.50
(E) 0.75
(D) 0.65



1. A mixture of C2H6(g) and C3H8(g) in a..-阿摩線上測驗