1. Chapter 9.1 stoichiometry –
branch of chemistry that deals with mass relationships
given a balanced chemical equation and a mass, can find the mass of another chemical in the equation

2. Chapter 9.1
4 step process
balance the chemical equation and write the mass of the given substance
convert the given mass to moles
(stoich step) convert the moles of given substance to moles of unknown substance
convert moles of unknown substance to grams

3. Chapter 9.1
mass of → moles of → moles of → mass of given (g) given unknown unknown (g) mole ratio – conversion factor that relates the amount of moles of any two substances involved in a chemical reaction - comes directly from the balanced chemical equation

4. Chapter 9.1
4 Al + 3 O2 → 2 Al2O3 Given 5.0 mol of Al find mol of O2 and Al2O3.

5. Chapter 9.1
4 Al + 3 O2 → 2 Al2O3 How many grams of Al2O3 will be produced by the reaction of 40.0 g of O2?

6. Chapter 9.1