You're probably too young to have had a Physics class in school, but frozen ice is still 2 molecules of Hydrogen and 1 molecule of Oxygen aka H2O aka Water.
A. They teach chemical reactions in chemistry class, not physics.
B. It’s in physics class where they might explain why it’s real hard to swim in ice.
C. Two molecules of H and one molecule of O is expresses as 2H2O.
D. Once you evolve real science, All Aquaman’s fictional powers suddenly go poof.