Ibuprofen, a headache remedy, contains 75.69% C, 8.80% H, and 15.51% O by mass, and has...
Ibuprofen, a headache remedy, contains 75.69% C, 8.80% H, and 15.51% O by mass, and has a molar mass of 206 g/mol.
Express your answers as chemical formulas separated by a comma.
Homework Answers
moles C = 75.69 g /12.011
g/mol = 6.302
Moles H = 8.80 g / 1.008 g/mol =8.73
Moles = = 15.51 g / 15.9994 g/mol = 0.9694
we divide by the smallest number
6.302/ 0.9694 = 6.5 =>C
8.73 / 0.9694 = 9 => H
0.9694 / 0.9694 = 1 => O
to grt whole numbers we multiply by 2
C13 H18O2 is the empirical formula ( MM = 206 g/mol)
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