• How do you know how much propane is left in the tank?
  • You can buy gauges at hardware stores that measure gas pressure.
  • Avogadro’s hypothesis states that equal volumes of all gases at the same temperature and pressure contain the same number of gas particles.
  • One mole of any gas at standard temperature andpressure (0°C and 1 atm) occupies a volume of 22.4 L. These characteristics make stoichiometry problems involving gases at STP very straightforward.
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