Question

Why is density of ice less than water?​

Answer 1

Answer:

Ice actually has a very different structure than liquid water, in that the molecules align themselves in a regular lattice rather than more randomly as in the liquid form. It happens that the lattice arrangement allows water molecules to be more spread out than in a liquid, and, thus, ice is less dense than water.

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Answer 2

Answer:

Ice is less dense than water because the orientation of hydrogen bonds causes molecules to push further apart,which lowers the density of the open space collapses,and the result is the formation of liquid water.The ice is melting due to pressure which makes it more dense.