From Hmolpedia
Jump to navigation Jump to search

In chemistry, mol (TR:31) (LH:3) (TL:34), from the German mol “small mass” (Nernst, 1895), aka “gram mol” (or g-mol) or “gram molecule” (Ostwald, 1893), is the base unit of mass in laboratory-scale chemical reactions, defined as the amount of substance that contains an Avogadro number of elementary units, equivalent to the number of atoms in a 12 gram sample of carbon 12.[1]


In the 1980s, Mole Day, celebrated on 6.02 (6:02AM to 6:02PM) x 1023 (Oct 23), was founded and began to be celebrated in America, in various high school chemistry classes.[2]

End matter

See also


  1. Mol – Hmolpedia 2020.
  2. Mole Day – Wikipedia.

External links

  • Mole (unit) – Wikipedia.
Theta Delta ics T2.jpg