1.22 calculate empirical and molecular formulae from experimental data

1.22 1. list all elements in the compound

        2. underneath, right their masses or percentages as a direct mass

        3. divide each mass or percentage by the RFM

        4. turn them into ratios by multiplying or dividing all by the same number

        

        •to get the empirical formulae, divide by the largest factor to get the ratio 

        •remember molecular and empirical formulae are different things: empirical tells you the ratio whilst the molecular tells you actual number of atoms of each element in a single molecule