An Unknown Compound Is Composed of 65

question 46

Multiple Choice

An unknown compound is composed of 65.44% C, 29.07% O, and 5.49% H. A sample weighing 5.34 g, when dissolved in 60.00 g H₂O, lowers the freezing point to -0.600°C. What is the molecular formula of the compound? (Kf for water = 1.86°C/m; C = 12.0, O = 16.0, H = 1.0 g/mol) .

• A) C₃H₃O
• B) CHO
• C) C₁₄H₁₁O₆
• D) C₅H₅O₅
• E) C₇H5O₃

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