Why is ice less dense than water? a. the water molecules in ice have less mass than in liquid water b. the water molecules are more closely packed together in ice than in water. c. the water molecules form crystalline lattice structures in ice where they are more spread out d. the water molecules in ice have less volume than in liquid ice.

What is the study of how matter and energy interact? a. biology b. physics c. planetary science d. chemistry

The boiling point of propanoic acid is higher than that of 1-butanol because: propanoic acid has a higher molecular weight than 1-butanol. propanoic acid is more soluble in water than 1-butanol. propanoic acid is a better hydrogen bond donor than 1-butanol. propanoic acid forms hydrogen bonded dimers and 1-butanol does not. 1-butanol forms hydrogen bonded dimers and propanoic acid does not.

What are the similarities of physical and chemical change ?