1. Find the empirical formula of a compound that is found to contain 47.9% Zn and 52.1% Cl.
2. Find the empirical formula of a compound, given that a 48.5g sample of a compound is found to contain 1.75g C, and 46.749 Br.
3. What is the empirical formula of a 212.1g sample of a compound that contains 42.4g H and 169.7g C? What is the molecular formula of the compound having a molecular mass of 30.0g?
4. A compound has a molecular mass of 391.5g. Analysis of a 310.8g sample of the compound shows that it contains 302.2g I and the rest is Boron. Find the empirical and molecular formulas for the compound.
5. A compound contains 30.45% N and 69.55% 0. What is the molecular formula if its molecular mass is 92.02g?
6. A compound contains 42.56g Pd and 0.80g of hydrogen, with a molecular mass of 216.8g. Find the molecular formula of the compound.
7. Octane, a compound of hydrogen and carbon, also known as hydrocarbons, has a molecular mass of 114.26g. If octane is 15.75% hydrogen, what is the molecular formula of octane?
8. Calculate the empirical formula of a compound that contains 1.67g Ce and 4.549 I.
9. 2-Methylpropene is a compound used to make synthetic rubber. If a sample of 2- methylpropene contains 0.556g C and .0933g H, what is its empirical formula?
10. Aspirin, with a molecular mass of 180.g, contains 60.0% C, 4.48% H, and 35.5% 0. What are the empirical and molecular formulas of aspirin?