The formula for the unknown compound is CxHyOz. The combustion reaction of the unknown is:
CxHyOz + O2 → x CO2 + y H2O
From this, we can see that all of the CO2 and H2O formed came from the unknown. Complete combustion of 4.30 g of butyric acid produced 8.59 g CO2 and 3.52 g H2O.
The foul odor of rancid butter is due largely to butyric acid, a compound containing carbon, hydrogen, and oxygen. Combustion analysis of a 4.30-g sample of butyric acid produced 8.59 g CO2 and 3.52 g H2 O.
Find the empirical formula for butyric acid.
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