Final answer:
The presence of hydrogen bonds in a molecule allows them to interact with polar water through hydrogen bonding. Hydrogen bonds form between slightly positive charges in polar covalent molecules, such as water, and slightly negative charges on other polar molecules.
Step-by-step explanation:
The presence of hydrogen bonds in a molecule allows them to interact with polar water through hydrogen bonding. When polar covalent bonds containing a hydrogen atom form, the hydrogen atom has a slightly positive charge. This allows it to be attracted to neighboring negative partial charges, such as those on oxygen or nitrogen atoms. This weak interaction, called a hydrogen bond, is responsible for the unique properties of water and its ability to form hydrogen bonds with other polar molecules.