2. 100 Avocado- Avogadro 400 300 200 500 100 In perfect balance 400 300 200 500 100 Convert me. 400 300 200 500 100 % % % 400 300 200 500 100 I’m counting on you. 400 300 200 500

3. Column 1, 100 What is Avogadro’s number?

4. Column 1, 200 How many moles are in 3.31 x 10 24 molecules of strontium carbonate (SrCO 3 )?

5. Column 1, 300 How many atoms are in 17.0 moles of silver (Ag)?

6. Column 1, 400 How many moles of magnesium are 1.25 x 10 23 atoms of magnesium?

7. Column1, 500 How many atoms are in 3.65 moles of glucose (C 6 H 12 O 6 )?

8. Column 2, 100 State the law of conservation of matter.

9. Column 2, 200 Complete an atom inventory for the following equation, then determine if the equation is balanced or not. Li 2 O + H 2 O  2 LiOH

10. Column 2, 300 In order to balance this equation, what coefficient must be placed in front of water? Fe 2 O 3 + H 2 → Fe + H 2 O

11. Column 2, 400 Show the coefficients used to balance the following chemical equation: H 3 PO 4 + HCl → PCl 5 + H 2 O

12. Column 2, 500 Show the coefficients used to balance the following chemical equation: SeCl 6 + O 2 → SeO 2 + Cl 2

13. Column 3, 100 How many moles are in 33 grams of gold (Au)?

14. Column 3, 200 How many grams are in 7.0 moles of CaSO 4 ?

15. Column 3, 300 How many moles are in 594.8 grams of (NH 4 ) 2 SO 4 ?

16. Column 3, 400 How many moles are present in 352 g of iron (III) oxide, Fe 2 O 3 ?

17. Column 3, 500 How many grams are present in 1.43 moles of magnesium hydroxide, Mg(OH) 2 ?

18. Column 4, 100 What percent of glucose (C 6 H 12 O 6 ) is oxygen?

19. Column 4, 200 What percent of CuCl 2 is chlorine?

20. Column 4, 300 What percent of Al(NO 3 ) 3 is nitrogen?

21. Column 4, 400 What percent of iron(III) hydroxide, Fe(OH) 3, is oxygen?

22. Column 4, 500 Which element makes up the greatest percentage of Al(NO 3 ) 3 ? What percent is that?

23. Column 5, 100 Calculate the molar mass of C 2 H 4

24. Column 5, 200 How many atoms are in 3 molecules of AgNO 3 ?

25. Column 5, 300 Calculate the molar mass of Zn 3 (PO 4 ) 2

26. Column 5, 400 Find the molar mass of malachite: Cu 2 CO 3 (OH) 2.

27. Column 5, 500 What is the molar mass of Paris Green? Cu(C 2 H 3 O 2 ) 2 ·3Cu(AsO 2 ) 2