Science on Instagram: "Density is a characteristic physical property of a liquid, defined as its mass per unit volume (  ρ=mass/volumerho equals mass / volume 𝜌=mass/volume ). It determines how closely the molecules are packed together and dictates whether a liquid will float or sink when layered with another substance. Key Characteristics and Factors The density of liquids is relatively constant compared to gases, as liquids are nearly incompressible under normal pressures. Molecular Makeup: