Name: KEY
Stoichiometry Mid-Unit Review
Mole Ratios:
Balance each of the following equations. Then, write the mole ratio for the two compounds/elements in
the box.
1) 2 NaNO3 + PbO โ Pb(NO3)2 + Na2O
NaNO3 to Na2O: PbO to Pb(NO3)2:
2) 6 AgI + Fe2(CO3)3 โ 2 FeI3 + 3 Ag2CO3
AgI to FeI3: Fe2(CO3)3 to Ag2CO3:
3) V2O5 + 5 CaS โ 5 CaO + V2S5
V2O5 to CaO: CaS to V2S5:
4) S8 + 8 O2 โ 8 SO2
S8 to SO2: O2 to SO2:
5) Fe + 2 AgNO3 โ Fe(NO3)2 + 2 Ag
Fe to Fe(NO3)2: AgNO3 to Ag:
Mole Ratio Conversions:
Balance the following equations and solve each of the following. You must show work to receive credit.
6. 2 H2 + O2 โ 2 H2O
a. How many moles of H2O are produced when 5.00 moles of oxygen are used?
10 mol H2O
b. If 3.00 moles of H2O are produced, how many moles of oxygen must be consumed?
1.5 mol O2
c. Using the information from part b, how many moles of hydrogen gas must be used?
3.00 mol H2
d. Suppose 4.00 grams of H2 were used? How many moles of water would be produced?
2 mol H2
2/1
1/1
6/2
1/3
1/5
5/1
1/8
1/1
8/8
2/2
