Question: what is the difference between the structure of liquid water and the structure of ice?
Answer: In its liquid state, a water molecule is on average only hydrogen-bonded to approximately 3.4 neighbouring water molecules at any one time. The density of liquid water is 1.00 g/cubic cm. In contrast, ice is the solid form of water. ... In ice, each water molecule is hydrogen-bonded to 4 other water molecules.