As a substance changes phase from gas to liquid to solid:
1 The spacing between molecules increases.
2 Its density generally increases.
3 The spacing between molecules is not affected.
4 It undergoes a chemical change.

Why is soap used to remove grease? a. its nonpolar end dissolves the grease. b. it makes the water bond with the grease. c. it chemically bonds with the grease. d. its polar end dissolves the grease.correct answer for apex - a, its nonpolar end dissolves the grease.

Which fact represents evidence for the big bang theory?

In which reaction is precipitation occurring?