Stoichiometry Problems

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Stoichiometry Problems Stoichiometry Problems

1. How many moles Of Oxygen are produced when 11.5 g of NO2 is formed? 1. How many moles Of Oxygen are produced when 11.5 g of NO2 is formed? 2Pb(NO3)2 → 2PbO + 4NO2 + O2 2Pb(NO3)2 → 2PbO + 4NO2 + O2

2. How many grams of H3P04 are produced when 10.0 moles of water react with an excess of 2. How many grams of H3P04 are produced when 10.0 moles of water react with an excess of P4O10? P4O10? P4O10 + 6H2O → 4H3PO4 P4O10 + 6H2O → 4H3PO4

3. Aluminum reacts with sulfuric acid to produce aluminum sulfate and hydrogen gas. How 3. Aluminum reacts with sulfuric acid to produce aluminum sulfate and hydrogen gas. How many grams of aluminum sulfate would be formed if 250.00 g H2S04 completely react with many grams of aluminum sulfate would be formed if 250.00 g H2S04 completely react with aluminum? aluminum? 2Al + 3H2SO4 → Al2 (SO4)3 + 3H2 2Al + 3H2SO4 → Al2 (SO4)3 + 3H2

4. How many grams of Beryllium are needed to produce 36.0 g of hydrogen? 4. How many grams of Beryllium are needed to produce 36.0 g of hydrogen? Be + 2H2O → Be(OH)2 + H2 Be + 2H2O → Be(OH)2 + H2

5. How many moles of oxygen would be needed to produce 12.00 L of water? 5. How many moles of oxygen would be needed to produce 12.00 L of water? 2H2(g) + O2(g) → 2H2O(g) 2H2(g) + O2(g) → 2H2O(g)

6. How many liters of oxygen are needed to produce 51.0 moles of Al2O3? 6. How many liters of oxygen are needed to produce 51.0 moles of Al2O3? 4Al + 3O2 → 2AI2O3 4Al + 3O2 → 2AI2O3

7. If 3.00 L of oxygen reacts with excess octane, what volume of carbon dioxide will be 7. If 3.00 L of oxygen reacts with excess octane, what volume of carbon dioxide will be produced? produced? 2C8H18 + 25O2 → 16CO2 + 18H2O 2C8H18 + 25O2 → 16CO2 + 18H2O

8. If a chemist needs 800.0 L of hydrogen to fill an atmospheric balloon, how many grams of 8. If a chemist needs 800.0 L of hydrogen to fill an atmospheric balloon, how many grams of water should she/he decompose? water should she/he decompose? 2H2O → 2H2 + O2 2H2O → 2H2 + O2

9. How many liters of nitrogen would be produced from the decomposition of 50.0 g of 9. How many liters of nitrogen would be produced from the decomposition of 50.0 g of ammonia? ammonia? 2NH3 → N2 + 3H2 2NH3 → N2 + 3H2

10. How many grams of CO are needed to react with an excess of Fe2O3 to produce 591 g of 10. How many grams of CO are needed to react with an excess of Fe2O3 to produce 591 g of Fe? Fe? Fe2O3 + 3CO → 3CO2 + 2Fe Fe2O3 + 3CO → 3CO2 + 2Fe Answers

1. 0.0625 moles 2. 653 grams 3. 290.71 grams 4. 161 grams 5. 333.15 moles (water is a liquid! 12 liters is 12,000 grams!)

6. 1710 L O2 7. 1.92 L CO2 8. 643 g H2O 9. 34.94 L N2 10. 445 g CO