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hugo211
hugo211
02.06.2020 • 
Chemistry

AND PLEASE SHOW WORK !
1. Ibuprofen, a common headache remedy, has an empirical formula of C7H9O and a molar mass of approximately 215 g/mol. Find the molecular formula.
2. Determine the empirical formula and molecular formula for a compound composed of 1.04g K, 0.700 g Cr, and 0.86g O. Its molar mass is 388 g/mol.
3. Serotonin is a compound that conducts nerve impulses in the brain. It contains 68.2% C, 6.86% H, 15.9% N, and 9.08% O. Its molar mass is 176 g/mol. What is its empirical formula and molecular formula.

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