Chemistry

Question Analysis
This question evaluates the student's ability to determine the molecular formula from the empirical formula and the molar mass.

Key Concept Explanation
The molecular formula is a multiple of the empirical formula, and this multiple (n) can be found by dividing the molar mass of the compound by the molar mass of the empirical formula.

Step-by-step Solution
1. Determine the molar mass of the empirical formula C₂H₃O: (2 × 12.01) + (3 × 1.008) + 16.00 = 43.044 g/mol.
2. Calculate n: n = 86 g/mol / 43.044 g/mol ≈ 2.
3. Multiply the subscripts in the empirical formula by n:

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