A gas is confined in a rectangular tank 25.0 cm long, 8.0 cm high, and 10.4 cm wide. If the density of the gas is 19.3 g/L.
The substance's mass per unit of volume is known as its density (volumetric mass density or specific mass).
The density of a pure substance is equal to its mass concentration in numbers. Density varies widely among materials and may be important in relation to packaging, purity, and buoyancy. The densest known elements under conditions of normal temperature and pressure are osmium and iridium.
It is occasionally substituted by the dimensionless quantity "relative density" or "specific gravity," which is the ratio of the density of the material to that of a standard material, typically water, to make density comparisons across different systems of units easier.
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