2. THE MOLE (2’56”video: “The Mole and Conversion Methods”)

3. What is the mole? We’re not talking about this kind of mole!

4. What is the Mole? A large amount!!!!

5. n 1 mole of hockey pucks would equal the mass of the moon! n 1 mole of basketballs would fill a bag the size of the earth! n 1 mole of pennies would cover the Earth 1/4 mile deep!

6. Counting Units

7. Practice! ◦ If I have 1 mole of marshmallows, how many do I have? ◦ If I have 2 moles of jelly beans, how many do I have? ◦ If I have 6.02 x 10 23 pennies, how many do I have? 6.02 X 10 23 Marshmallows 2 moles 6.02 x 10 23 jelly beans 1 mole = 1.2 x 10 24 jelly beans 1 mole of pennies

8. = The number of Carbon atoms in 12 grams of Carbon-12

9. Masses ◦Atomic Mass: mass of 1 atom of any element (unit: amu) ◦Molar Mass: mass of 1 mole of atoms / molecules (unit: gram) From the Periodic Table, 1 Carbon atom weighs 12 amu’s 1 mole of Carbon atoms weighs 12 grams

10. Calculating Molar Mass for Compounds

11. Examples for Molar Masses of Compounds 1.Water H 2 O 2(1.01) + 16.00 = 18.02 g/mol 2. Sodium chloride NaCl 22.99 + 35.45 = 58.44 g/mol