1. Moley, moley, mole…  Objective:  EVERY SWBAT perform stoichiometric conversions from mole to mass, from mass to mass  Catalyst:  How is a mole similar to a dozen?  What contains more atoms, 1 mole of silver atoms, or 1 mole of gold atoms?  What is the molar mass of sulfuric acid (H 2 SO 4 )?

2. Agenda  Catalyst  Atom Conversions (20min)  Mass Conversions (20min)  Little bit of both  Exit Question

3. Mole to atoms  What conversion factor is needed to go from moles to number of particles (molecules/atoms)? ____mol Y = ___Particles of Y  What conversion factor is needed to go from number of particles to moles? _____particles of Y= _____ mol Y

4. Practice  You have 13 min to do the following problems. Your goal is to make sure that EVERY group member can set up the following problems on their own.  I will be walking around quizzing members of each group on how to make the correct conversion factors  Pg 311, number 1 and 3  Pg 312 number 4

5. Mass - Mole  Problems involving mass (grams) use the molar mass as a conversion factor.  What is the conversion factor to go from grams to moles? ____g Y = ____moles Y  What is the conversion factor to go from moles to grams? ___moles Y= ____grams Y

6. Practice  You have 13 min to do the following problems. Your goal is to make sure that EVERY group member can set up the following problems on their own.  I will be walking around quizzing members of each group on how to make the correct conversion factors  Front of mole-gram worksheet

7. A little bit of both  Problems involving mass (Grams) and number of particles (atoms/molecules) need to use 2 conversion factors ___g Y =___atoms Y ___atoms Y =___g Y

8. Practice  You have 13 min to do the following problems. Your goal is to make sure that EVERY group member can set up the following problems on their own.  I will be walking around quizzing members of each group on how to make the correct conversion factors  Gram-atoms worksheet  When everybody in your group can complete the problems, finish the worksheet from yesterday

9. Exit Question  How many moles are in 34 grams of NaCl?  How many atoms are in 3 moles of NaCl?  How many atoms are in 13 grams of aluminum?