Chemistry

Question Analysis
This question involves calculating the empirical formula from percent composition, then finding the molecular formula using molar mass. The main focus is on accurate mole ratio calculation and handling fractional ratios by multiplying by a common factor.

Key Concept Explanation
If mole ratios result in fractional values (e.g., 0.33, 0.67), multiply all ratios by a small integer (2, 3, etc.) to obtain whole numbers for the empirical formula.

Step-by-Step Solution
1. Assume 100 g sample and convert to moles
C:
H:
O:
2. Find mole ratio (divide by smallest mole value, 1.669)
C:
H:

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