Normal condition of gas is kg/m3 due to it's volume can be changed by temperature and pressure. at iupac standard temerature and pressure (0 °c and 100 kpa), dry air has a density of 1.293 kg/m3.
Glossary
Normal condition of gas is kg/m3 due to it's volume can be changed by temperature and pressure. at iupac standard temerature and pressure (0 °c and 100 kpa), dry air has a density of 1.293 kg/m3.