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Which compound is an isomer of C2H5OC2H5?

June 2017 NY Regents Chemistry Exam


26 Which compound is an isomer of C2H5OC2H5? 1) CH3COOH

(2) C2H5COOCH3

(3) C3H7COCH3

(4) C4H9OH


Solution: Isomers are molecules with the same formula but different structure. The compound given has 4 carbons, 10 hydrogens and 1 oxygen. Choices 1 and 2 can be eliminates since they have 2 oxygens. Choice 3 has 5 carbons and can be eliminated as well. Choice 4 has 4 carbons, 1 oxygen and 10 hydrogens.

Answer: 4



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