Represent carboxylic acids in displayed, structural and molecular formula forms.

Carboxylic acids are organic compounds characterized by the presence of the functional group –COOH, known as the carboxyl group. They can be represented in three different ways: the displayed formula shows all atoms and bonds explicitly, the structural formula provides a simplified view of the molecule's connectivity, and the molecular formula indicates the number of each type of atom present. For example, the molecular formula for ethanoic acid is C2H4O2, while its displayed formula illustrates the arrangement of atoms, highlighting the carboxyl group. Understanding these representations is crucial for identifying and working with carboxylic acids in organic chemistry.