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Ibuprofen Is 75

Question 78

Multiple Choice

Ibuprofen is 75.69% C, 8.80% H, and 15.51% O by mass.What is its empirical formula?

A) C₆H₉O
B) C₉H₉O₂
C) C₇H₁₈O₂
D) C₇H₉O₂
E) C₁₃H₁₈O₂

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