Stoichiometry Worksheet
Chemistry
Name______________________
Date___________
1.
In the reaction : 2Al2O3(l) → 4Al(s) + 3O2(g), the mole ratios are:
Al2O3 to Al ________
Al2O3 to O2 ________
Al to O2 ________
O2 to Al _______
2.
In the reaction: 2H2 + O2 → 2H2O, the mole ratio of oxygen to water is: ________
3.
In the reaction: Ca + Cl2 → CaCl2, the mole ratio of chlorine to calcium is: _______
4.
In the reaction: Zn + H2SO4 → ZnSO4 + H2, the mole ratio of zinc to sulfuric acid
is:
_________
5.
The equation for the Haber process is represented by:
N2(g) + 3H2(g) → 2NH3(g)
To convert 9.0 moles of hydrogen to ammonia would require how many moles of
nitrogen?
6.
In the equation: 2KClO3(g) → 2KCl(s) + 3O2(g), how many moles of oxygen are
produced when 3.00 moles of KClO3 decompose completely?
7.
For the reaction: C(s) + 2H2(g) → CH4(g), how many moles of H2 are required to
produce 10.0 moles of CH4?
8.
For the reaction: 2H2 + O2 →
6.00 moles of H2?
9.
For the reaction: 2HgO(s) → 2Hg(l) + O2(g), how many grams of O2 are produced
from 10 moles of mercury(II) oxide?
10.
For the reaction: CaO + SO3 → CaSO4, how many moles of CaSO4 are produced
from 40.0 g of SO3?
11.
If 40.0 g of sulfur dioxide are formed in the reaction:
mass of O2 used?
12.
In the reaction: Mg + 2HCl → H2 + MgCl2, how many moles of MgCl2 can be
2H2O, how many grams of water are produced from
S + O2 → SO2, what is the
produced from 6 moles of Mg and 8 moles of HCl? What is the limiting reactant?
Which reactant is present in excess?
13.
In the reaction: 2H2 + O2 → 2H2O, how many moles of water will be produced if
6 moles of H2 and 2 moles of O2 are available to react? What is the limiting reactant?
Which reactant is present in excess?
14.
For the reaction: Mg + 2HCl → H2 + MgCl2, how many moles of MgCl2 can be
produced from 48.6 g of Mg and 73 g of HCl? What is the limiting reactant? Which
reactant is present in excess?
15.
For the reaction: 2H2 + O2 → 2H2O, calculate the %yield if 860 g of water are
produced when 100. g of H2 react with an excess of O2.
16.
For the reaction: C + 2H2 → CH4, calculate the %yield if 98 g of methane (CH4)
are produced when 100. g of carbon react with an excess of hydrogen.