1. Stoichiometry 1. Mole - mole 2. Mole - mass 3. Mass - mole
Moles A  Moles B
2. Mole - mass
Moles A  Moles B  Mass B
3. Mass - mole
Mass A  Moles A  Moles B
4. Mass - mass
Mass A  Moles A  Moles B  Mass B

2. A B
N H2  3 2
NH3
How many moles of ammonia will be produced from 4.5 moles of hydrogen?
mass A  moles A  moles B  mass B 2
mol NH3
4.5
mol H2 x =
3 mol NH3 3
mol H2

3. B
HgO  Hg O2 2 2 A
How many moles of mercury (II) oxide are needed to produce 125 g of oxygen?
mass A  moles A  moles B  mass B 1
mol O2 2
mol HgO
125
g O2 x x =
7.81 mol HgO
32.0
g O2 1
mol O2

4. A B
Fe3O CO  Fe + CO2 4 3 4
What mass of Fe can be produced from the complete reaction of 4.0 moles of CO?
mass A  moles A  moles B  mass B 3
mol Fe
55.85
g Fe
4.0
mol CO x x = 4
mol CO 1
mol Fe
g Fe

5. Fe3O CO  Fe + CO2 4 3 4 A
What mass of CO2 can be produced from 25.0 g of Fe3O4? B
mass A  moles A  moles B  mass B 1
mol Fe3O4 4
mol CO2
44.01
g CO2
25.0
g Fe3O4 x x x =
231.55
g Fe3O4 1
mol Fe3O4 1
mol CO2
19.01 g CO2

6. WO H2  W H2O 3 3
What mass of hydrogen is needed to produce 75.0 g of tungsten?

7. 2
Al + H2SO4  Al2(SO4)3 + H2 3 3
If grams of aluminum reacts, what mass of aluminum sulfate will be produced?

8. Fe + CuSO4  Fe2(SO4) Cu
How many moles of CuSO4 is required to produce grams of Cu?

9. AgNO3 + BaCl2  AgCl + Ba(NO3)2
What mass of barium chloride is needed to produce grams of silver chloride?