On whether ethyl acetate can form hydrogen bonds
Ethyl acetate, its molecular structure contains carbonyl and ethoxy groups. It is well known that the formation of hydrogen bonds requires molecules containing electronegative atoms (such as nitrogen, oxygen, fluorine) and active hydrogen atoms to interact with another electronegative atom.

In ethyl acetate, although the oxygen of the carbonyl group is electronegative, there are no active hydrogen atoms directly connected to oxygen, nitrogen, and fluorine in the molecule. Therefore, from the perspective of conventional hydrogen bond formation conditions, it is difficult for ethyl acetate to form hydrogen bonds between its own molecules such as alcohols and carboxylic acids.

However, in a specific environment, when encountering water molecules, the oxygen of the carbonyl group of ethyl acetate can form hydrogen bonds with the hydrogen of water molecules. In this case, ethyl acetate realizes the formation of hydrogen bonds with the help of external molecules containing active hydrogen.

In summary, it is not easy to form hydrogen bonds between molecules in a simple ethyl acetate system; however, when suitable active hydrogen molecules are present, ethyl acetate can participate in the formation of hydrogen bonds.