Moles to Moles Conversion
Potassium chlorate decomposes into potassium chloride and oxygen gas.
2K(ClO3)  2KCl + 3O2
1. How many moles of oxygen are produced when 3.0 moles of potassium chlorate decompose completely?
2. How many moles of K(ClO3) were needed to produce 5 moles of O2?
3. You start with 10 moles of K(ClO3) how many moles of KCl and O2 needed?
Use the reaction of butane (C4H10) undergoing combustion to answer questions 4-6.
2C4H10(l) + 13O2(g)  8CO2(g) + 10H2O(l)
4. How many moles of CO2 are produced when 88 moles of O2 are used?
5. How many moles of water are needed when 10 moles of C4H10 used?
6. 12 moles of CO2 were made. How many moles of O2 were needed?
1
Moles to Grams Conversion
What are the molecular weights of the following compounds?
1. NaOH
4. Mn2Se7
2. H3PO4
5. MgCl2
3. H2O
6. (NH4)2SO4
7. Given the following equation: 2 NaClO3 → 2 NaCl + 3 O2. With 12.00 moles of NaClO3 how many
grams of O2 will produce?
8. For the reaction C + 2H2 → CH4, how many grams of hydrogen are required to produce 0.6 moles of
methane, CH4 ?
9. Balance the reaction: _____Cl2 + ____KBr → _____KCl +_____ Br2. Calculate how many grams of
potassium chloride are produced from 4.3 moles of potassium bromide?
10. Balance the reaction: ____Zn +____ O2 → ____ZnO. Calculate how many grams of zinc oxide can be
produced from 7.3 moles of oxygen?
2
Grams to Mole Conversion
1. Given the following equation: 2 NaClO3 → 2 NaCl + 3 O2. With 12 g of NaClO3 how many moles of
O2 will produce?
2. For the reaction C + 2H2 → CH4, how many moles of hydrogen are required to produce 0.6 grams of
methane, CH4 ?
3. Balance the reaction: _____Cl2 + ____KBr → _____KCl +_____ Br2. Calculate how many moles of
potassium chloride are produced from 4.3 grams of potassium bromide?
4. Balance the reaction: ____Zn +____ O2 → ____ZnO. Calculate how many moles of zinc oxide can be
produced from 7.3 grams of oxygen?
3
Grams to Grams Conversion
1. For the reaction C + 2H2 → CH4, how many grams of hydrogen are required to produce 145 grams of
methane, CH4 ?
2. For the reaction 2HNO3 + Mg(OH)2 → Mg(NO3) 2 + 2H2O, how many grams of magnesium nitrate are
produced from 981 grams of nitric acid, HNO3 ?
3. For the reaction Cl2 + 2KBr → 2KCl + Br2, how many grams of potassium chloride are produced from
113 g of chlorine?
4. Balance the reaction: _____Zn +_____ O2 → _______ZnO, how many grams of zinc oxide can be
produced from 2.75 g of oxygen?
Balance the reaction and use the equation to answer questions 5-8.
_____C2H2 + ____O2 → _____CO2 + ______H2O
5. How many grams of water are produced from 100 grams of oxygen?
6. How many grams of water are produced from 100 grams of acetylene (C2H2)?
7. What is the limiting reagent for the production of water?
4
Limiting Reactant
8. Balance:
C3H8
+ O2

CO2
+
H2O
a) If you start with 14.8 g of C3H8 and 3.44 g of O2, determine the limiting reagent
b) determine the number of moles of carbon dioxide produced
c) determine the number of grams of H2O produced
d) determine the number of grams of excess reagent left
9. Given the following equation:
Al2(SO3)3 + 6 NaOH  3 Na2SO3
+ 2 Al(OH)3
a) If 10.0 g of Al2(SO3)3 is reacted with 10.0 g of NaOH, determine the limiting reagent
b) Determine the number of moles of Al(OH)3 produced
c) Determine the number of grams of Na2SO3 produced
d) Determine the number of grams of excess reagent left over in the reaction
5. Given the following equation:
Al2O3
+ Fe  Fe3O4
+
Al
a) If 25.4 g of Al2O3 is reacted with 10.2 g of Fe, determine the limiting reagent
b) Determine the number of moles of Al produced
c) Determine the number of grams of Fe3O4 produced
d) Determine the number of grams of excess reagent left over in the reaction
5