Name: ___________________________
Period: ______
Date: ______________
WS 8.3: Moderate Stoichiometry Problems
Directions: Solve the following Problems
1) Given the reaction below, what’s the theoretical yield of FeSO4 in grams when 4.6 moles of H2O reacts?
2 FeS2 + 7 H2O  2 FeSO4 + 2 H2SO4
2) What’s the theoretical yield of H3PO3 in grams when .945 moles of H2O reacts? P4O6 + 6 H2O  4 H3PO3
3) Cu(s) + 4 HNO3(aq)  Cu(NO3)(aq) + 2 NO2(g) + 2 H2O(l)
What mass of NO2 is made when 9.6 g Cu reacts?
4)
C25H52(s) + 38 O2(g)  25 CO2(g) + 26 H2O(l)
How many moles paraffin (C25H52) are needed to produce 750 grams of Carbon Dioxide?
5)
How many moles Tungstun (VI) Oxide is needed to produce 75 grams of Tungstun?
WO3 + 3 H2  W + 3 H2O.
6)
Suppose .25 grams of AgNO3 are used. What’s the theoretical yield of silver in grams?
2 AgNO3 + Cu  2 Ag + Cu(NO3)2
7)
In the reaction below, what is the maximum mass of I2 that can be liberated from 60.0 grams of NaI?
COC12 + 2 NaI  2 NaCl + CO + I2
8)
If 90 grams of CoCO3 reacts with an excess of O2, how many moles of Co3O4 will be produced?
6 CoCO3 + O2  2 Co3O4 + 6 CO2
9) If 2.09 moles of C6H14 reacts with an excess of Oxygen gas, what is the theoretical yield of CO2 in grams?
2 C6H14(l) + 8 O2(g)  12 CO2(g) + 14 H2O(g)
10) If 5 grams of Na3PO4 are used, what’s the theoretical yield of Ca3(PO4)2 in grams?
2 Na3PO4 + 3 CaCl2  Ca3(PO4)2 + 6 NaCl
11) If 280 grams of ethane (C2H6) combusts given the equation below, how many grams of water and how many grams of
Carbon Dioxide will form? 2 C2H6(g) + 14 O2(g)  4 CO2(g) + 6 H2O(g)
12) How many grams of Sodium Nitrate and how many grams of Sodium are required if you desire 570 grams of
Sodium Oxide? 10 Na + 2 NaNO3  6 Na2O + N2O
13) Write your own stoichiometry problem using a reaction from a previous assignment or one from the internet and
then solve it.