A 250-L Flask Contains a Mixture of Methane (CH₄) and Propane

question 51

Multiple Choice

A 2.50-L flask contains a mixture of methane (CH₄) and propane (C₃H₈) at a pressure of 1.45 atm and 20 ^$\circ$ C. When this gas mixture is then burned in excess oxygen, 8.60 g of carbon dioxide is formed. (The other product is water.) What is the mole fraction of methane in the original gas mixture

• A) 0.145
• B) 0.341
• C) 0.659
• D) 0.855
• E) 1.00

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