We’re being asked to determine the empirical formula of ibuprofen, given the mass percent of C, H, and O.
Recall that the empirical formula is the simplest whole-number ratio formula of a compound.
For this problem, we need to do the following steps:
Step 1: Calculate the mass and moles of C, H, and O in the compound.
Step 2: Determine the lowest whole number ratio of C, H, and O to get the empirical formula.
The elemental mass percent composition of ibuprofen (a nonsteroidal anti-inflammatory drug [NSAID]) is 75.69 % C, 8.80 % H, and 15.51 % O.
Determine the empirical formula of ibuprofen.
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