A sample of a compound contains 59.9% carbon, 13.5% hydrogen, and 26.6% oxygen by mass. What is the empirical formula of the compound?
Options
A
C₂H₆O
B
C₃H₈O
C
C₄H₁₀O
D
C₅H₁₂O
Answer & Analysis
Answer
B
Analysis
Question Analysis
This question assesses the student's ability to determine the empirical formula from the percent composition of a compound.
Key Concept Explanation
The empirical formula is determined by converting the percent composition to moles, finding the mole ratio, and then simplifying to the smallest whole-number ratio.
Step-by-step Solution
1. Assume a 100g sample
Mass of C = 59.9 g
Mass of H = 13.5 g
Mass of O = 26.6 g
2. Convert grams to moles (use approximate molar masses: C = 12 g/mol, H = 1 g/mol, O = 16 g/mol for high school calculations)
Moles of C =
Moles of H =
Moles of O =
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