Chapters 4, 6-7 Practice Problems

1. Write the names for the following substances: HI, CO₂, N₂, BaCl₂, CaSO₄

2. Write the formulas for the following compounds: Chloric acid, Magnesium phosphate, Nitrogen dioxide, Calcium nitride

3. Categorize each substance above as a molecule, molecular compound, ionic compound or acid

4. What type of bonds are found in a molecule, molecular compound, ionic compound, polyatomic ions or acid? What type of bonds are found in each of the compounds from question 1? How do these types of bonds form?

5. What are the monatomic cations from question 1 and 2? What about polyatomic anions?

6. How do cations and anions differ? what do they have in common? which is written first in a formula?

7. What are the names of each family, what elements are in those families and what are their oxidation numbers?

8. What is the molar mass of the compounds in question 1?

9. If you have 12 grams of CO₂, how many moles do you have? what about molecules?

10. What is the percent composition of each element in CaSO₄?

11. How does percent composition contribute to the performance of a substance from the real world?

12. If you have 40 g of Ca and 70.8 g of Cl, what is the empirical formula?

13. What is the empirical formula for N₂O₆?

14. If the empirical formula for a compound is CH₂O, and the molecular mass is 90g, what is the molecular formula?

15. If you have 3.2 gal of water, how many cups is this? 1gal=4 qts and 1 qt=4 cups