MOLE TO MOLE REVIEW PROBLEMS
DIRECTIONS: FIRST, Balance the following reactions, and THEN answer the
questions that follow each.
1. MgCl2 + Zn yields Mg + ZnCl2
a. How many moles of Magnesium are produced if 4 moles of Zinc react?
b. How many moles of Zinc chloride are produced if 6 moles of Magnesium
chloride react?
2. HCl + Al (OH)3 yields AlCl3 + H2O
a. How many moles of water are produced if 12 moles of hydrochloric acid
react?
b. How many moles of hydrochloric acid react if 6 moles of aluminum
chloride are produced?
3. N2 + H2 ---> NH3
a. How many moles of nitrogen react with 9 moles of hydrogen?
b. How many moles of ammonia (NH3) are produced if 4 moles of nitrogen
react?
4. SO2 + O2 ---> SO3
a. Write the molar ratio for O2 to SO3
b. Write the molar ratio for O2 to SO2.
c. How many moles of oxygen react with 6 moles of sulfur dioxide?
5. PCl3 + Cl2 ---> PCl5
a. Write the molar ratio for PCl3 to Cl2
b. Write the molar ratio for PCl3 to PCl5.
c. How many moles of chlorine react with 3.5 moles of phosphorus
trichloride?
6. NH3 + O2 ---> N2 + H2O
a.
b.
c.
d.
Write the molar ratio for NH3 to N2
Write the molar ratio for H2O to O2.
How many moles of oxygen react to form 8 moles of nitrogen?
How many moles of ammonia (NH3) react to form 6.5 moles of water?
7. Fe2O3 + CO ---> Fe + CO2
a.
b.
c.
d.
Write the molar ratio for CO to CO2
Write the molar ratio for Fe to CO.
How many moles of Iron (III) oxide react form 6 moles of iron?
How many moles of carbon dioxide are produced when 1.5 moles of
carbon monoxide react?
8. Ba3 (PO4)2 + NaCl yields BaCl2 + Na3 PO4
a. Write the molar ratio for sodium chloride to barium chloride.
b. Write the molar ratio for barium phosphate to sodium phosphate.
c. How many moles of barium chloride are produced if 12 moles of sodium
chloride react?
d. How many moles of barium phosphate are required if 7 moles of sodium
phosphate are produced?