1. WHACK-A-MOLE 1 2 3 8 5 6 7 12 9 1011 16 13 141520 1718 19 4

2. 1 Convert 192 grams of NaNO3 to number of formula units.

3. 2 What is the percent composition of phosphorus in Zn3(PO4)2?

4. 3 What is the empirical formula for a compound that contains 10.89% magnesium, 31.77% chlorine, and 57.34% oxygen?

5. 4 Calculate the number of atoms in 13.2 moles of copper.

6. 5 What is the correct molar mass for CaBr2?

7. 6 How many moles of Ag contain 4.49 x 1023 atoms Ag?

8. 7 The mass of each element making up 37.2 grams of a compound were measured. Based on these data, what is the correct formula for the compound? ElementMass in 37.2 grams of compound Magnesium10.72 g Carbon5.30 g Oxygen21.18 g

9. 8 Which element has a molar mass of 30.974 g/mol?

10. 9 What is the molar mass of the element Calcium?

11. 10 Which is the correct empirical formula for this substance? ElementPercent Composition C37.5% H12.5% O50.00%

12. 11 What is the molar mass for the compound FeSO4?

13. 12 Which is the formula for a compound that contains 64.75 g nitrogen and 185.25 g oxygen? a.NO2 b.NO c.N2O d.N2O5

14. 13 What is the mass of 8 moles of sodium chloride?

15. 14 Which is the percent composition of bromine in the compound NaBr? a.81.6% b.79.9% c.84.1% d.77.7%

16. 15 Which term is described as the lowest whole-number ratio of elements in a compound? a.hydrate b.molecular formula c.empirical formula d.percent composition

17. 16 Find the number of moles in 8.3 x 1025 atoms of Nitrogen.

18. 17 Determine the empirical formula for succinic acid that is composed of 40.6% carbon, 5.18% hydrogen, and 54.22% oxygen.

19. 18 What is the number of moles present in 200 g magnesium?

20. 19 What is the empirical formula for hydrogen peroxide?

21. 20 What is the molar mass of methane?