A compound is composed of 40.0% carbon, 6.7% hydrogen, and 5...

Question Analysis
This question tests the student's ability to determine both the empirical and molecular formulas from the percent composition and the given molar mass.

Key Concept Explanation
First, determine the empirical formula from the percent composition. Then, use the molar mass to find the molecular formula.

Step-by-step Solution
1. Assume a 100 g sample: C: 40.0 g, H: 6.7 g, O: 53.3 g.
2. Convert grams to moles: C: , H: , O: .
3. Find the mole ratio: C: , H:

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