19. which property of the water molecule causes two water molecules to be attracted to each other? a. polar bonds between h and o atomsb. ionic bonding between water moleculesc. hydrogen bonds between h atomsd. dionic bonding between o atoms

Hydrogen bonds between H atoms

Explanation:  Hydrogen Bonding is the kind of force of attraction which can only be present in the molecules having electronegative atom and the hydrogen atom attached to it.

Thus water molecules have both Oxygen atom as the electronegative atom and hydrogen attached to electronegative atom O.

Thus one H atom of one water molecule forms a hydrogen bond with the oxygen atom of another molecule.

Moreover, these hydrogen bonds are weaker than the standard covalent bond.