5.1 - Understanding Chemical Quantities

• one mole of an element in grams

  one mole of an element has a mass equal to its relative atomic mass in grams
• molar mass

  masses of one mole

  unit: g mol^-1
• equation for moles

  mass of substance/molar mass
• Avogadro constant

  the number of atoms, molecules or formula units in one mole of any substance

  6.02x10^23
• number of atoms/molecules/formula units equation

  amount of chemical (moles) x Avogadro's constant