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A compound contains only carbon, hydrogen, and oxygen. Combustion of 11.75 mg of the compound yields 17.61 mg CO2 and 4.81 mg H2O. The molar mass of the compound is 176.1 g/mol. What are the empirical and molecular formulas of the compound? (Type your answer using the format CO2 for CO2.)

A compound contains only C, H, and N. Combustion of 28.0 mg of the compound produces 26.8 mg CO2 and 32.9 mg H2O. What is the empirical formula of the compound? (Type your answer using the format CO2 for CO2.)

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