3.3 Mass Percents and Empirical and Molecular Formulas
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| Mass Percent |  | Molecular Formula | Most reduced integer ratio of atoms in a compound |
|---|---|
| Empirical Formula | Ratio of the actual number of atoms per molecule of a compound. It is either the same or a multiple of the empirical formula. |
You have 300g of CaCO3. What is the percentage of carbon in the sample? What is the %O?
A certain compound is 80.0% carbon and 20.0% hydrogen by mass. What is its empirical formula? If the compound above has a molecular weight of 30a.m.u., what is its molecular formula?