Chapter 9 Worksheet 3



Stoichiometric Conversions (2 points each)

1. How many grams of sodium hydroxide can be produced from 3.8 grams of calcium hydroxide? Na2CO3 + Ca(OH)2 ( 2 NaOH + CaCO3

|How many amu (atomic mass units) of oxygen are needed to produce 15.9 grams of tetraphosphorus decoxide? _____P4 + _____O2 ( |

|_____P4O10 |

| |

3. How many moles of oxygen are needed to produce 10.0 grams of phosphorus pentoxide? ____ P + ____ O2 ( ____ PO5

4. How many moles of sodium hydroxide can be produced from 5.01 X 1024 atoms of sodium? 2 Na + 2 H2O ( 2 NaOH + H2

5. How many moles of sulfuric acid are needed to produce 3.48 grams of hydrogen? Zn + H2SO4 ( ZnSO4 + H2

6. How many grams of calcium sulfate can be produced from 8.39 grams of calcium hydroxide? ____ Al2(SO4)3 + ____ Ca(OH)2 (

7. How many grams of water are needed to produce 9.5 moles of calcium hydroxide? CaO + H2O ( Ca(OH)2

8. How many grams of iron are needed to produce 1.75 grams of iron (II) nitrate? ____ Fe + ____ CuNO3 ( ____ Fe(NO3)2 + ____ Cu

Determine Limiting Reactant (3 points, 6 min)

9. If .500 moles of solid aluminum are added to .720 moles of iodine, then aluminum iodide is formed.

Balanced equation:

How many grams of AlI3 are formed?

What is the limiting reactant? What is the excess reactant?

10. When 10.45 grams of aluminum and 66.55 grams of copper (II) sulfate react, copper and aluminum sulfate are formed.

Balanced equation:

How many grams of Cu are formed?

What is the limiting reactant? What is the excess reactant?

11. If 15.50 grams of lead (II) nitrate mixes with 3.81 grams of sodium chloride, then sodium nitrate and lead (II) chloride are formed.

Balanced Equation:

How many grams of NaNO3 are formed?

What is the limiting reactant? What is the excess reactant?

Determine Percent Yield (3 points, 3 min)

12. If 9.00 grams of aluminum is reacted with 8.00 grams of sulfur, then what is the theoretical yield of aluminum sulfide? If 10.5 grams of aluminum sulfide is produced, what is the percent yield?

Balanced Equation:

13. If .13 grams of oxygen and .33 grams of iron are reacted, then what is the theoretical yield of iron (III) oxide. If 0.020 grams of iron (III) oxide is produced what is the percent yield?

Equation: ___ Fe + ___ O2 ( ___ Fe2O3

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