Amount of substance

Amount of substance (also called chemical amount) is a quantity defined by standards to measures the size a group of individual elementary entities, such as atoms, molecules and electrons, along with other particles. The International System of Units (SI) defines the amount of substance to be equal to the number of elementary entities present. The SI unit for amount of substance is the mole (mol). The mole is defined as the amount of substance that contains the same number of elementary entities as there are atoms in 0.012kg of the isotope carbon-12.[1] This number is called Avogadro's number and has the value 6.02214179(30)×1023.[2] It is the numerical value of the Avogadro constant which has the unit 1mol (or mol-1), and relates the molar mass of an amount of substance to its mass.

  • references

References

  1. International Bureau of Weights and Measures (2006), The International System of Units (SI) (PDF) (8th ed.), pp. 114–15, ISBN 92-822-2213-6 
  2. Mohr, Peter J.; Taylor, Barry N.; Newell, David B. (2008). "CODATA Recommended Values of the Fundamental Physical Constants: 2006". Rev. Mod. Phys. 80: 633–730. doi:10.1103/RevModPhys.80.633. http://physics.nist.gov/cuu/Constants/codata.pdf.http://physics.nist.gov/cuu/Constants/codata.pdf.Direct link to value.
Other Languages
العربية: كمية مادة
Bân-lâm-gú: Bu̍t-chit-liōng
беларуская: Колькасць рэчыва
Boarisch: Stoffmengan
brezhoneg: Kementad danvez
Deutsch: Stoffmenge
eesti: Ainehulk
Esperanto: Materikvanto
한국어: 물질량
hrvatski: Množina tvari
Bahasa Indonesia: Jumlah zat
latviešu: Vielas daudzums
Bahasa Melayu: Amaun bahan
Nederlands: Stofhoeveelheid
日本語: 物質量
Nordfriisk: Mengde
norsk nynorsk: Stoffmengd
Plattdüütsch: Stoffmengde
slovenčina: Látkové množstvo
српски / srpski: Količina supstance
srpskohrvatski / српскохрватски: Količina tvari
文言: 物量
吴语: 物质个量
粵語: 物質量
中文: 物质的量