1. Unit: Stoichiometry Incorporating representative particles and volume into stoichiometry calculations Day 3 - Notes

2. After today you will be able to… Calculate the volume or number of particles produced or reacted of a substance given its chemical equation

3. Remember… 1 mole = 6.02x10 23 atoms, molecules, or formula units 1 mole = 22.4L (for any gas at STP)

4. More Stoichiometry Conversions Example: How many grams of aluminum can react with 336L of oxygen? aluminum + oxygen  __Al + __ O 2  __ Al 2 O 3 43 2 K: 336L O 2 U: ? g Al 336L O 2 1 x 4 mol Al 3 mol O 2 = 5.40x10 2 g Al 1 mol O 2 22.4L O 2 x x 26.98 g Al 1 mol Al aluminum oxide Al +3 O -2

5. More Stoichiometry Conversions Example: Using the same equation, how many formula units of aluminum oxide can be produced from 137 grams of aluminum? __Al + __ O 2  __ Al 2 O 3 43 2 K: 137g Al U: ? F.U. Al 2 O 3 137g Al 1 x 2 mol Al 2 O 3 4 mol Al = 1.53x10 24 F.U. Al 2 O 3 1 mol Al 26.98g Al x x 6.02x10 23 F.U. 1 mol Al 2 O 3

6. Questions? Complete WS 3 for HOMEWORK!