What substance is capable of forming hydrogen bonds 1) methylethanoate 2) ethyl ester of formic acid 3) propanoic acid 4) propanol

A hydrogen bond is a bond between hydrogen and a strongly electronegative element (F, N, O). Moreover, hydrogen itself must directly combine with such an element. It is thanks to such bonds that water has a liquid state of aggregation.
Answer: 3) propanoic acid.



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