The amount of heat in a substance depends on the of the
molecules.

The correct answer that would best complete the given statement above is the term MOTION. The amount of heat in a substance depends on the motion of the molecules. Since the temperature is defined as the measure ofthe average kinetic energy of molecules. The higher the temperature, the faster the motion of the molecules would be. Hope this answer helps.

Yes i think so not 100 percent sure though

True, the standard unit for volume is liters which can be represented by either a lower case "l" or a capital "l"