Structure 1.4 – Counting particles by mass : the mole

S1.4.6 – Avogadro’s Law

📌 Moles in gaseous state

  • Avogadro’s law relates the volume of gases to the number of moles
  • The law states that equal volumes of any gas at equal temperature and equal pressure contain an equal number of particles
  • One mole of any gas will occupy 22.7 dm3 of gaseous volume
  • Using this, we can then calculate the number of moles in different volumes of a gas as well as the volume of gas that a given number of moles might occupy

1 mole : 22.7 dm3 of gas : : x moles : y dm3 of gas