C3 Quantitative Chemistry

• Relative Formula Mass


  The sum of the relative atomic masses of a molecule's atoms.
• Relative Atomic Mass


  The average mass of an atom of an element, in units of u (unified atomic mass units).
• Calculating Relative Formula Mass

  Step 1: Find the relative atomic masses of each atom in the molecule. Step 2: Add the relative atomic masses together.
• Mole (mol)


  A unit of measurement in chemistry, used to express the amount of a substance.
• Calculating Molar Mass


  Step 1: Find the relative formula mass (RFM) of the substance. Step 2: Express the RFM in grams per mole (g/mol).