The mand size of the molecules in a liquid and how closely they are packed together determine the density of the liquid. Just like a solid, the density of a liquid equals the mof the liquid divided by its volume; D = m/v. The density of water is 1 gram per cubic centimeter..Purpose: The purpose of this lab is to determine the density of a metal object and two 2 liquids. Materials. Procedure: Part A : The Density of a Metal Cylinder. Measure the Put exactly 10.0 mL of water in a 50.0 mL graduated cylinder..