Common mistakes to avoid in Stoichiometry • Incorrectly identifying the given (known) and wanted(unknown) quantities. • Incorrectly choosing the limiting reagent. • Using the coefficient when calculating the molar mass. • Using the wrong units. • Using the wrong conversion factor, example: 1mol or 1 mol 22.4 L 6.02 x 1023 particles Practice solving the following problem: How many moles of oxygen will be produced from 10 g of water?