1. January 8 Agenda Do Now (7 mins) Pass out Molar Highways and P.T.’s (2 mins.) Molar Highway Review Lecture (15 mins) M.H. Full Class Practice Problem (15 mins) M.H. Independent Practice Problem (15 mins) Exit Question

2. 4 MINUTES: How many protons are in Sodium (Na)? How many electrons are in Sodium (Na)? How many neutrons are in Sodium (Na)? We will then discuss answers for 3 minutes

3. The Molar Highway is a Graphic Organizer that we use to make stoichiometric calculations easier Mass MolesMolecules Moles Molecules of of Atom Atom Mass of Atom ----------------------------------------------------------- Break up line -------------------------------------

4. The portion of the molar highway below the breakup line, deals with whole compounds: Example: CO 2 In order to move between Mass, Moles and Molecules, you must Be able to perform any one of the following mathematical Calculations: Mass MolesMolecules Divide by Molar Mass Multiply by Molar Mass Multiply by A’s Number Divide by A’s Number

5. The portion of the Molar Highway above the breakup line deals with parts of a compound. This is why we call it the breakup line, because we know that if we cross it, we have to break up our compound, or vice versa. Mass MolesMolecules Moles Molecules of of Atom Atom Mass of Atom ----------------------------------------------------------- Break up line ------------------------------------- Multiply By Subscript Multiply By Subscript Divide By Subscript Divide By Subscript Divide by Atomic Mass Multiply by Atomic Mass

6. Mass MolesMolecules Moles Molecules of of Atom Atom Mass of Atom ----------------------------------------------------------- Break up line ------------------------------------- Multiply By Subscript Multiply By Subscript Divide By Subscript Divide by Atomic Mass Multiply by Atomic Mass Divide By Subscript Divide by Molar Mass Multiply by Molar Mass Multiply by A’s Number Divide by A’s Number

7. If you have 18 grams of H 2 O, how many grams of Oxygen (O) do you have? If you have 18 grams of H 2 O, how many molecules of Hydrogen (H) do you have?

8. How many moles of Carbon (C) are in 88 grams of CO 2 ? Extra Tough: A scientist breaks apart CO 2 gas and collects 1.2 X 10 24 molecules of carbon, how many grams of CO 2 did he break apart?

9. If I give you 2 moles of CO 2, how many grams of carbon (C), do you have?