1. Empirical formula – the chemical formula of a compound written using the smallest, whole number, mole ratio between atoms in the compound.
What is the empirical formula of a compound that contains 43.2 g of carbon and g of oxygen?
What is the empirical formula of a compound that contains 70.0% Fe and 30.0 % O? (Hint: assume you have 100 g of the compound)
What is the empirical formula of a compound that contains 81.8% C, and 18.2% H?
Molecular formula – the actual chemical formula of a compound (not in lowest terms) which is a multiple of the empirical formula.
multiple = molar mass of compound
molar mass of empirical formula
A compound has an empirical formula of NO2. The molar mass of the actual compound is 92.0 g/mol. Determine the molecular formula.