1. Stoichiometry Problems

2. How many moles of CaC2 are needed to react with 49 g of water?
CaC2 + 2H2O → C2H2 + Ca(OH)2
How many moles of CaC2 are needed to react with 49 g of water?

3. How many grams of C2H2 are produced from 5 g of CaC2
CaC2 + 2H2O → C2H2 + Ca(OH)2
How many grams of C2H2 are produced from 5 g of CaC2

4. CaC2 + 2H2O → C2H2 + Ca(OH)2
How many grams of calcium hydroxide are produced when 0.89 mol of C2H2 are produced?

5. CaC2 + 2H2O → C2H2 + Ca(OH)2
If I have 7.2 x 1024 molecules of water, how many moles of calcium hydroxide can I produce?

6. How many grams of CO2 are produced from 50 L of oxygen gas at STP?
2 C2H2 + 5 O2 → 4 CO2 + 2 H2O
How many grams of CO2 are produced from 50 L of oxygen gas at STP?

7. How many grams of oxygen are required to burn 52.0 g of C2H2?
2 C2H2 + 5 O2 → 4 CO2 + 2 H2O
How many grams of oxygen are required to burn 52.0 g of C2H2?

8. 2 C2H2 + 5 O2 → 4 CO2 + 2 H2O
If I start with 8.02 x 1025 molecules of C2H2 , how many liters of carbon dioxide gas can I produce?

9. 4 Al O2 → 2 Al2O3
How many moles of Al2O3 will be formed from 17 mols of Al?

10. 4 Al O2 → 2 Al2O3
How many grams of oxygen are needed to react with 42.0 grams of aluminum?

11. 4 Al O2 → 2 Al2O3
If you start with 25.0 grams of Al, how many grams of aluminum oxide can you produce?

12. 4 Al O2 → 2 Al2O3
If you need to produce grams of aluminum oxide, how many liters of oxygen gas should you start with?

13. Write the balanced equation for this reaction
Magnesium reacts with hydrochloric acid to produce magnesium chloride and hydrogen gas
Write the balanced equation for this reaction

14. Using the balanced equation from the previous problem…..
How many grams of hydrogen gas will form if you start with 25.0 g of magnesium?