Question

Determine the molecular formula

for Ibuprofen, a common

remedy. Analysis of ibuprofen

yields a molar mass of 206 g/mol

and a percent composition of

75.7% C, 8.80% H, and 15.5% O.

Answer 1

N(C)=(206×0.757)/12=13

N(H)=(206×0.0880)=18

N(O)(206×0.1550)/16=2

Answer: C₁₃H₁₈O₂