Final answer:
Hydrogen atoms that are covalently bonded to electronegative atoms such as oxygen or nitrogen can form hydrogen bonds, as seen in water molecules and other compounds like CH2CO2H and NH3.
Step-by-step explanation:
The question "Circle all the hydrogen atoms that can form hydrogen bonds" relates to the concept of hydrogen bonding in Chemistry. In water molecules (H2O), hydrogen bonds can form because each hydrogen atom is covalently bonded to a highly electronegative oxygen atom, which also possesses two lone pairs of electrons.
These lone pairs can form hydrogen bonds with the hydrogen of adjacent water molecules, creating an extended network of interactions.
Considering the molecules CH2CO2H, (CH3)2N, NH3, and CH2F, the hydrogen atoms bound to nitrogen and oxygen can indeed participate in hydrogen bonding.
For example, in CH2CO2H, the hydrogen atoms attached to the oxygen in the -CO2H group can form hydrogen bonds due to their positive polarization and the oxygen's negative polarization. Similarly, in NH3, the hydrogens are slightly positive and can form hydrogen bonds with other nitrogen atoms in NH3 molecules.