An unknown gas contains 83% C and 17% H by mass.If effuses at 0.87 times the rate of CO₂ gas under the same conditions.What is the molecular formula of the unknown gas? A)C₂H₅ B)C₃H₃ C)C₄H₁₀ D)C₇H₁₇

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Quizplus · Accepted Answer

The molecular formula of the unknown gas can be determined using the given mass percentages and the effusion rate compared to CO. The effusion rate ratio (0.87) squared equals the molar mass ratio of CO to the unknown gas. The molar mass of CO is 28 g/mol. Solving for the unknown gas's molar mass gives approximately 16 g/mol for CH4 (methane), which corresponds to choice C, CH₄.

An Unknown Gas Contains 83% C and 17% H by Mass.If