Chemical Quantities II Worksheet
A.K.A Stoichiometry
Name: ______________________________________________Period: _________________ Date:_________
1. Consider the reaction represented by the unbalanced equation
NH3 + O2 NO + H2O
Balance the equation and determine for every 1.00 mol of NH3 that reacts, how many mol
of O2 is required?
2. A bookcase is to be built from 3 shelves (Sh), 2 side boards (Sb), 1 top (T), 1 base (B),
and 4 legs (L). Write a “balanced equation” for the construction of this bookcase.
3. Fill in the missing boxes for the following reaction.
Reactant
+ Reactant
3H2(g)
N2(g)
atoms N2
6 atoms H2
1 molecule N2
6.02 x 1023
molecules N2
molecules
NH3
molecules
NH3
molecules
H2
3 x 6.02 x 1023 molecules H2
1 mol N2
28 g N2
= Product
2NH3(g)
2 mol NH3
mol H2
3x
6.02 x 1023
molecules NH3
g H2
2x
g NH3
4. The equation for the formation of potassium chloride is given by the equation:
2K(s) + Cl2(g)  2KCl(s)
Write the six possible mole ratios for this equation.
5. Consider the following unbalanced equation:
HCl+ MnO2 H2O+ MnCl2 +Cl2
You have 5.00 grams of manganese(IV) oxide:
a.
How many moles of manganese(IV) oxide do you have?
b.
Convert the moles of MnO2 to moles of O2
c.
How many grams of HCl would react with the 5.00 grams of MnO2?