mass is how much "stuff" its made up of.
The amount of matter is mass. Volume is the amount of space that matter takes up. The amount of matter in a given volume is density.
Mass/volume is called density.
density is mass/volume
...will be the product of the material's volume and density.
The amount of matter in an object is usually described with its mass or volume.
The amount of matter in a given volume of space is its D-E-N-S-I-T-Y Its Density NOT Volume!
Mass amount of matter in an object; given in units such as gramsVolume amount of space occupied by matter; milliliters (mL) and liters (L) are common units of volume
"Amount of matter" is an informal (and not very precise) description of what is formally called the mass.
Volume; mass is a measure of the amount of matter, and volume is a measure of the amount of space.
Since "amount of matter" is measured as an object's mass and "a given space" is measured as volume, the amount of matter in an a given space should equal mass/volume. Mass divided by volume is an object's density. Acceptable units of density include: grams/liters, kilograms/cubic meters, slugs/cubic inch, slugs/cubic foot, and many others.
Mass is the amount of matter in an object. Volume the amount of space an object has.
Matter is anything that has mass and volume.