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OCW Scholar - Introduction to Solid State Chemistry 8 Online
OpenStudy (anonymous):

ibuprofen is a compound used in pain killers when a 2.174 gram sample is burned completely it yields 6.029 grams CO2 and 1.709 grams H20 as the sole products. what is the percent composition, by mass of ibuprofen. what is the empirical formula of ibuprofen

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