1. Stoichiometry Mole-to-Mole:
How many moles of water are produced when moles of oxygen react with propane?
C3H8(g) + 5 O2(g) → 3 CO2(g) + 4 H2O(g)

2. Stoichiometry Mole-to-Mole:
How many moles of water are produced when moles of oxygen react with propane?
C3H8(g) + 5 O2(g) → 3 CO2(g) + 4 H2O(g)
? mol

3. Stoichiometry Mole-to-Mole:
How many moles of water are produced when moles of oxygen react with propane?
C3H8(g) + 5 O2(g) → 3 CO2(g) + 4 H2O(g)
? mol
3.5 mol

4. Stoichiometry Mole-to-Mole:
How many moles of water are produced when moles of oxygen react with propane?
C3H8(g) + 5 O2(g) → 3 CO2(g) + 4 H2O(g) =
? mol
3.5 mol
5.0 mol
4.0 mol
X =
= 2.8 mol H2O
Does it make sense?

5. Stoichiometry Mole-to Mass:
Calculate the mass of hydrogen produced when 2.7 moles of potassium react with water.
2 K(s) H2O(l) → 2 KOH(s) + H2(g)

6. Stoichiometry Mole-to Mass:
Calculate the mass of hydrogen produced when 2.7 moles of potassium react with water.
2 K(s) H2O(l) → 2 KOH(s) + H2(g)
? (g)

7. Stoichiometry Mole-to Mass:
Calculate the mass of hydrogen produced when 2.7 moles of potassium react with water.
? g
2 K(s) H2O(l) → 2 KOH(s) + H2(g)
2.7 mol
2.0 mol
2.02 g =
X =
= 2.7 g H2
Does it make sense?

8. Stoichiometry Mass-to-Mass:
Determine the mass of carbon dioxide produced
when g of hydrochloric acid react with calcium
carbonate.
CaCO3(s) + 2HCl(aq) → CaCl2(aq) + H2O(l) + CO2(g)

9. Stoichiometry Mass-to-Mass:
Determine the mass of carbon dioxide produced
when g of hydrochloric acid react with calcium
carbonate.
CaCO3(s) + 2HCl(aq) → CaCl2(aq) + H2O(l) + CO2(g)
? g
54.75 g
2 (36.46) g
44.01 g =
33.04 g CO2
X = =
Does it make sense?

10. Class discussion (Practice):
1) How many moles of CO2 are produced when 2.5 moles of oxygen react with propane?
C3H8(g) + 5 O2(g) → 3 CO2(g) + 4 H2O(g)

11. Class discussion (Practice):
1) How many moles of CO2 are produced when 2.5 moles of oxygen react with propane?
C3H8(g) + 5 O2(g) → 3 CO2(g) + 4 H2O(g)
2.5 mol
? mol
5.0 mol
3.0 mol =
= 1.5 mol CO2
X =
Does it make sense?

12. 2) Calculate the mass of water required to react with 2
2) Calculate the mass of water required to react with 2.7 moles of potassium.
2 K(s) H2O(l) → 2 KOH(s) + H2(g)

13. 2 K(s) + 2 H2O(l) → 2 KOH(s) + H2(g)
2) Calculate the mass of water required to react with 2.7 moles of potassium.
2 K(s) H2O(l) → 2 KOH(s) + H2(g)
2.7 mol
? g
2.0 mol
2(18.02) g =
X =
= 49 g H2O
Does it make sense?

14. 2 C2H2(g) + 5 O2(g) → 4 CO2(g) + 2 H2O(g)
3) How many grams of CO2 are produced when
78.0 g of C2H2 burns?
2 C2H2(g) + 5 O2(g) → 4 CO2(g) H2O(g)

15. 2 C2H2(g) + 5 O2(g) → 4 CO2(g) + 2 H2O(g)
3) How many grams of CO2 are produced when
78.0 g of C2H2 burns?
2 C2H2(g) + 5 O2(g) → 4 CO2(g) H2O(g)
78.0 g
? g
4(44.01) g
2(26.04) g =
264 g CO2
X = =
Does it make sense?