1. STOICHIOMETRY REVIEW

2. 4 Na + O2  2 Na2O
How many moles of sodium will be needed to react with moles of oxygen?

3. 15.3 moles Na

4. 4 Na + O2  2 Na2O
How many moles of Na2O can be produced from 13.5 mol Na?

5. 6.75 mol

6. 4 Na + O2  2 Na2O
How many moles of oxygen are needed to produce 34.7 g Na2O (61.98 g/mol)?

7. 0.280 mol

8. C2H O2  2 CO H2O
When mol oxygen are reacted, how many moles of carbon dioxide are produced?

9. C2H O2  2 CO H2O
How many grams of C2H4 ( g/mol) are needed to produce moles of water?

10. 51.9 g

11. C2H O2  2 CO H2O
How many grams of oxygen are needed to react with 2.56 g C2H4 (28.06 g/mol)?

12. 8.76 g

13. 2 C (s) + O2 (g)  2 CO Ig)
Solid carbon reacts with oxygen gas to produce carbon monoxide gas as shown above. Identify the limiting reactant when 3.25 mol oxygen is reacted with g C(12.01 g/mol). How much carbon monoxide can be made?

14. C is limiting reactant
72.7 g CO

15. N H2  2 NH3
What is the theoretical yield of NH3 (17.04 g/mol) that can be formed when 10.0 g N2 is reacted with 10.0 g H2?

16. N2 is limiting
12.1 g NH3 could be produced theoretically

17. Be HCl  BeCl2 + H2
Enough Be and HCl were added to produce 10.7 grams of beryllium chloride, but only 4.50 g BeCl2 were actually recovered. What is the percent yield?

18. 42.1 %

19. 2 LiOH + FeCl2  2 LiCl + Fe(OH)2
20.0 g LiOH (23.95 g/mol) was reacted and 31.1 g of LiCl were actually produced. What is the theoretical yield of LiCl (42.39 g/mol) and what is the percent yield?

20. 35.4 g LiCl
87.9%