Density determination is the process of calculating the density of a substance, which is defined as its mass per unit volume. This measurement helps identify materials and assess their purity. Density is typically expressed in grams per cubic centimeter (g/cm³) or kilograms per cubic meter (kg/m³). To determine density, one can use the formula: Density = Mass / Volume. The mass can be measured using a balance, while the volume can be determined through various methods, such as water displacement for irregularly shaped objects. Accurate density measurements are essential in fields like chemistry, materials science, and engineering.