What is The difference between mass and density?

Answer 1

Mass = measure of the amount of matter within an object Density = mass per unit of volume Think of one pound of gold and one pound of aluminum, at sea level on earth. They contain the same mass, but the mass is more dense in the gold, because its volume is much smaller.

Answer 2

Mass is the weight of an object. Density is a measure of how tightly the molecules are packed together in an object. Density is expressed as mass divided by volume, as in pounds per cubic foot (lb/ft3) or grams per cubic centimeters (gm/cc).