Why does ice have a different density than liquid water?
a. it has lighter molecules. b. it has more molecules. c. it has a different amount of space between molecules. d. it has several different kinds of molecules.

Option (C) is the correct answer.

Explanation:

When water freezes then hydrogen bonding present in water creates cage like structures due to which there occurs increase in volume and also, there occurs increase in spaces between the molecules.

So, it is known that density is mass per unit volume. When volume increases then there will be decrease in density. Hence, ice is able to float.

Thus, we can conclude that ice have a different density than liquid water because it has a different amount of space between molecules.