| A | B |
|---|
| mole | the amount of a substance that contains 6.02x10^23 representative particles of that substance |
| Avogadro's number | the number of representative particles contained in one mole of a substance; equal to 6.02x10^23 particles |
| representative particle | refers to the species present in a substance: atoms, molecules, or formula units |
| gram atomic mass | atomic mass of an element expressed in grams |
| gram molecular mass | mass of one mol of that compound |
| gram formula mass | mass of one mole of an ionic compound |
| molar mass | mass of one mole of the substance |
| STP | 1 atm, 0 degrees Celsius |
| molar volume | volume occupied by 1 mole of a gas at STP; 22.4L |
| percent composition | percent by mass of each element in a compound |
| empirical formula | formula with the lowest whole-number ratio of elements in a compound |
