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Problem 56

(a) The characteristic odor of pineapple is due to ethyl butyrate, a compound containing carbon, hydrogen, and oxygen. Combustion of 2.78 mg of ethyl butyrate produces 6.32 $\mathrm{mg}$ of $\mathrm{CO}_{2}$ and 2.58 $\mathrm{mg}$ of $\mathrm{H}_{2} \mathrm{O} .$ What is the empirical formula of the compound? (b) Nicotine, a component of tobacco, is composed of $C, H,$ and $N .$ A 5.250 -mg sample of nicotine was combusted, producing 14.242 $\mathrm{mg}$ of $\mathrm{CO}_{2}$ and 4.083 $\mathrm{mg}$ of $\mathrm{H}_{2} \mathrm{O} .$ What is the empirical formula for nicotine? If nicotine has a molar mass of $160 \pm 5 \mathrm{g} / \mathrm{mol},$ what is its molecular formula?

a) $\mathrm{C}_{3} H_{6} O$
b) Above

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