Determination of molecular
Can only obtain empirical formula from
just the percents by mass.
In order to get the molecular formula, the
molar mass of the compound must be
For cumene, the molar mass of
cumene is 120.2 g/mol.
Determine the empirical formula
Divide this formula weight into the molar
mass, you should get very close to a
Multiply the empirical formula by this
whole number to get the molecular