noun
mole
The SI unit for amount of substance.
The chemist measures half a mole of sodium chloride.
Etymology
From German Mol, shortened from Molekül, “molecule.” The unit now counts entities of many kinds, not only molecules.
More examples
- One mole of carbon contains exactly 6.02214076 × 10²³ carbon atoms.
- Two moles of hydrogen gas react with one mole of oxygen gas.
- We convert the sample's mass to moles before calculating the yield.
Forms
mole · moles
molar adjective — Expressed per mole of a substance.