Amount of substance and the mole

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  • Amount of substance and the mole
    • Amount of substance
      • The quantity whose unit is the mole. Chemists use 'amount of substance' as a means of counting atoms
      • Given the symbol n. Measured in a unit called moles (mol).
    • Avogadro constant (Na)
      • The number of atoms per mole of the carbon-12 isotope
      • 6.02 x 10^23 mol^-1
    • Mole
      • Amount of any substance containing as many particles as there are carbon atoms in exactly 12g of the carbon-12 isotope.
    • Molar Mass
      • The mass per mole of a substance. The units are g mol-1
      • n = m/Mr


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