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Combustion analysis of a 7.7773 g sample of an unknown organic compound produces 21.103 g of CO2 and 4.3193 g of H2O. Th...

Combustion analysis of a 7.7773 g sample of an unknown organic compound produces 21.103 g of CO2 and 4.3193 g of H2O. The molar mass of the compound is 324.38 g/mol.

A) Calculate the number of grams of C, H, and O in the original sample.

B) What is the empirical formula of the compound?

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ANSWER: A Assuming all combustion gives ччі о 21. 103 0. in the organre compound on. co- — 12 с — 12. 21 lоз чч = S. 255 зс AB) Calculation of empirical formula: no of moles of c (ne) = 5.Ass = 0.48 mot 12 NH = 0.48 - - 0.46 mol 4 N = 1.5423 - 16 = 0

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