Robinson Chemistry Name Chemical Formulas and Chemical Compounds Objectives 1. Explain the significance of a chemical formula 2. Explain the steps used to determine the formula of an ionic compound 3. How do you name an ionic formula given its formulas 4. Explain the steps used to name a binary molecular compound 5. Given its name how do you write out a molecular compound? 6. What are polyatomic ions and how are they used. 7. Add the polyatomic chart on page 226 to the back of you periodic chart, you will need to make it smaller to fit. 8. Add table three from page 228 to the back of you periodic chart, you will need to make it smaller to fit. 9. Add table 5 from page 230 in your book to the back of your periodic chart, you will need to make it smaller to fit. 10. List the rules for assigning oxidation numbers. 11. Give the oxidation number for each element in the formula of a chemical compound, explain how. 12. How can you name molecular compounds using oxidation numbers and the stock system? 13. Explain the steps necessary to calculate the formula mass or molar mass of any compound. 14. How can one convert between mass in grams and amount in moles of a compound? 15. How can the process be reversed to tell us the mass in grams if we know the number of moles. 16. How is percent composition calculated? 17. Define empirical formula, and explain how the term applies to ionic and molecular compounds. 18. Given a percentage or a mass composition how can on calculate the empirical formula 19. Explain the relationship between the empirical formula and the molecular formula of a compound. 20. Given an empirical formula how can one go back and figure out the molecular formula?