Density is an important property of matter, and may be used as a method for identification. In the experiment, you have determined the densities of regularly and irregularly shaped solids as well as of pure liquids and solutions. The density of a sample of matter represents the mass contained within a unit volume of space in the sample. For most samples, a unit volume means 1./0mL.. The units of density, therefore are quoted in terms of g/mL or g/cm3 for most solid and liquid samples of matter