Download homework 9.4 stoichiometry

NAME:
PERIOD:
HOMEWORK 9.4 STOICHIOMETRY
a. Review your notes.
b. Answer the following:
1. The reaction between solid sodium and iron (III) oxide (Fe 2O3) is one in a series of reactions that inflates an
automobile air bag:
6Na (s) + Fe2O3 (s) → 3Na2O (s) + 2Fe (s)
If 100.0g Na and 100.0g Fe2O3 are used in this reaction, determine:
a. the mass of solid iron produced
b. the limiting reactant
c. the reactant in excess
d. the mass of excess reactant that remains after the reaction is complete
2. Photosynthesis reactions in green plants use carbon dioxide and water to produce glucose (C 6H12O6) and oxygen
according to the following reaction:
6CO2 (g) + 6H2O (l) → C6H12O6 (aq) + 6O2 (g)
If 88.0g CO2 and 64.0g H2O are used in this reaction, determine:
a. the mass of glucose (C6H12O6) produced
b. the limiting reactant
c. the reactant in excess
d. the mass of excess reactant that remains after the reaction is complete
OVER
3. Iron is obtained commercially by the reaction of hematite (Fe 2O3) with carbon monoxide:
Fe2O3 (s) + 3CO (g) → 2Fe (s) + 3CO2 (g)
If 840.3g CO and 3992.5g Fe2O3 are used in this reaction, determine:
a. the mass of solid iron produced
b. the limiting reactant
c. the reactant in excess
d. the mass of excess reactant that remains after the reaction is complete
4. An alkaline battery produces electricity according to the following reaction:
Zn (s) + 2MnO2 (s) + H2O (l) → Zn(OH)2 (s) + Mn2O3 (s)
If 25.0g Zn and 30.0g MnO2 are used in this reaction, determine:
a. the mass of Zn(OH)2 produced
b. the limiting reactant
c. the reactant in excess
d. the mass of excess reactant that remains after the reaction is complete