In the centimeter-gram-second system, the unit of density is gram/cubic centimeter.

In the international system of units and China's legal units of measurement, the unit of density is kilogram/cubic meter.

Density is a measure of mass in a specific volume.

Density is defined as the mass of an object divided by its volume.

Extended data:

Generally speaking, no matter what substance, no matter what state it is in, with the change of temperature and pressure, the volume or density will change accordingly. The relationship between temperature T, pressure P and density ρ (or volume) is called the equation of state. The volume of a gas varies significantly with the pressure it is subjected to and the temperature it is at. For an ideal gas, the equation of state is

Where r is a gas constant, equal to 287.14m2 (2* seconds). If its temperature is constant, the density is proportional to the pressure; If its pressure is constant, its density is inversely proportional to its temperature.

For general gas, if the density is not large and the temperature is far from the liquefaction point, its volume changes with pressure close to the ideal gas; For gas with high density, the above equation of state should also be corrected appropriately.

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