What Is the Molecular Formula for Lactic Acid If an Elemental

question 83

Multiple Choice

What is the molecular formula for Lactic acid if an elemental analysis of this compound shows that it contains 40.0 mass % C, 6.71 mass % H and 53.3 mass % O and a mass spectrometry experiment indicates its molar mass is 90.08 g/mol.

• A) CH₁₄O₄
• B) C₂H₁₈O₃
• C) C₃H₆O₃
• D) C₄H₁₀O₂
• E) C₁₀H₂₀O₁₀

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