A.3.4 - Moles

• Mole formula

  m = nM
• mole units

  • m = mass (g)
  • n = # moles (mol)
  • M = molar mass (g/mol)
• Atoms are measured by moles because they are too small to be measured alone
• Avogardo’s number - 6.02 x 10^23

  • “Of” a formula unit in 1 mole
  • Number comes from # of carbon-12 in 12 grams