Question

What are the bonds between and within water molecules?

Answer 1

Well the intramolecular bond, the bonds within the molecule, are simply covalent `H-O` bonds....

Explanation:

But the intermolecular bonds, the bonds BETWEEN water molecules, are the result of hydrogen bonding.......

And hydrogen bonding occurs when hydrogen is bound to a strongly electronegative element such as oxygen, or nitrogen, or fluorine..

`H-stackrel(""^(-)delta)O-stackrel(delta^+)Hcdotsstackrel(""^(-)delta)O-stackrel(delta^+)H_2cdotsstackrel(""^(-)delta)O-stackrel(delta^+)H_2`

Such hydrogen-bonding interaction is VERY STRONG INTERMOLECULAR FORCE, and elevates the boiling point...

See this old answer...

The take-home message is that the normal boiling point of `OH_2`, and `HF`, and `NH_3`, are RIDICULOUSLY HIGH for such small molecules, and `"intermolecular hydrogen bonding"` is responsible..