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Chemistry vocabulary · Moles and Stoichiometry

Mole

Meaning in chemistry, with examples

/məʊl/nounCore term

In chemistry, mole means: The SI unit for amount of substance. One of these units contains about 6.022 × 10²³ particles, which lets chemists count atoms and molecules by weighing them.

In Turkish: mol

How it is used

The basic counting unit in every calculation; its symbol is mol. You convert grams to moles, calculate the number of moles and work in millimoles (mmol) in the lab. The substance follows 'moles of': moles of NaOH.

Example sentences

  1. How many moles of NaOH do we need to neutralize the acid?

  2. First convert the mass of the sample into moles.

Common collocations

  • number of moles
  • moles of
  • convert to moles
  • mole ratio
  • per mole
  • molar massThe mass of one mole of a substance, usually given in grams per mole (g/mol). For water it is about 18.02 g/mol.
  • Avogadro's numberThe number of particles in one mole of a substance, about 6.022 × 10²³. Strictly speaking, the Avogadro constant has the unit per mole (mol⁻¹).
  • molarityA measure of concentration: the number of moles of solute in one liter of solution. Its unit is mol/L, written M and read 'molar'.
  • stoichiometryThe calculation of the amounts of reactants and products in a reaction, using the mole ratios from the balanced equation.

More terms: Moles and Stoichiometry

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