Hydrogen Bonding in Water Molecules

Steps:

• Recall water's bent structure with oxygen partially negative (δ-) and hydrogens partially positive (δ+).
• Identify hydrogen bonds as attractions between δ+ H of one molecule and δ- O of another.
• Examine diagrams for dashed lines connecting δ+ H to δ- O between separate molecules.
• Eliminate options showing incorrect attractions or bonds.

Why C is correct:

• It depicts hydrogen bonds as dashed lines between the δ+ hydrogen of one water molecule and the δ- oxygen of an adjacent molecule, aligning with the definition of hydrogen bonding as a dipole-dipole interaction.

Why the others are wrong:

• A shows bonds between like charges (δ+ to δ+ or δ- to δ-), violating attraction rules.
• B illustrates covalent bonds within molecules instead of intermolecular hydrogen bonds.
• D depicts ionic bonds or attractions not specific to water's partial charges.

Final answer: C