Stoichiometry Holiday Assignment
(Will be graded for accuracy – 50 Points)
Show work for partial credit. Use significant figures and units in your answer.
Use the following reaction for all questions 1-7:
SnO2(s) + 2 H2(g) → Sn(s) + 2 H2O(g)
1. ______________________ What is the mole fraction of Sn to H2?
2. ______________________Calculate the moles of H2O produced from 7.9 moles of SnO2.
3. ______________________What mass of H2 is needed to completely react with 60.5
grams of SnO2?
4. ______________________ How many liters of H2O are produced from 29.8 liters of H2
at STP?
5. ______________________What mass of H2O is produced when 4.6 grams of SnO2 react
with 5.3 grams of H2?
6. ______________________ How many liters of water vapor are produced from 17.1
grams of SnO2 at STP?
7. ______________________ How many liters of H2 does it take at 35°C and 2.3 atm to
produce 5.7 grams of Sn?
Show work for partial credit. Use significant figures and units in your answer.
Use the following reaction for all questions 8-11:
Ba(OH)2(aq) + 2 HBr(aq) → BaBr2(aq) + 2 H2O(l)
8. ______________________ Determine the volume of 2.5 M HBr that must be added to
completely react with 450 mL of 1.2 M Ba(OH)2.
9. ______________________ How many moles of Ba(OH)2 are needed to completely react
with 23 mL of 1.5 M HBr?
10. ______________________ What concentration of 15 liters of HBr completely reacts
with 8.9 moles of Ba(OH)2?
11. ______________________ How many moles of BaBr2 are produced when 450 mL of 2.0
M HBr reacts with 520 mL of 2.5 M Ba(OH)2?
Show work for partial credit. Use significant figures and units in your answer.
Use the following reaction for all questions 12-13:
2 C2H6(g) + 7 O2(g)  4 CO2(g) + 6 H2O(l)
ΔH = -3120 kJ
12. ______________________ How much heat is produced from the combustion of 14.5
grams of ethane, C2H6?
13. ______________________ Calculate the moles of CO2 produced by burning enough
ethane to produce 5160 kJ of heat.