| A | B |
| Mole | SI unit that measures the amount of a substance |
| Avogadro's number | 6.02 x 10 ^23 |
| Representative Particle | The atoms, molecules, or ions present in a substance |
| Molar Mass | The mass of one mole of a substance |
| Avogadro's hypothesis | states that equal volumes of gases at the same temperature and pressure contain equal numbers of particles. |
| Standard temperature and Pressure | means a temperature of 0°C and a pressure of 101.3 kPa, or 1 atmosphere (atm). |
| Molar volume | is used to convert between the number of moles of gas and the volume of the gas at STP. |
| Density | Expressed in g/L, is used as a conversion factor |
| 22.4 L | The volume that one mol of any gas occupies at STP |