Today we will:

1. Today we will: Learn about the mole

2. Today we will:

3. Today we will:

4. Counting units: pair dozen score gross ream mole

5. Counting units: pair 2 dozen score gross ream mole

6. Counting units: pair 2 dozen 12 score gross ream mole

7. Counting units: pair 2 dozen 12 score 20 gross ream mole

8. Counting units: pair 2 dozen 12 score 20 gross 144 ream mole

9. Counting units: pair 2 dozen 12 score 20 gross 144 ream 500 mole

10. Counting units: pair 2 dozen 12 score 20 gross 144 ream 500 mole 602213670000000000000000

11. Counting units: pair 2 dozen 12 score 20 gross 144 ream 500 mole 6.02 x 1023

12. The mole 1 mole = 6.02 x 1023

13. The mole The mole, also called Avogadro's number, is the SI unit for the amount of a substance.

14. The mole How many roses in 3.5 dozen?

15. The mole How many roses in 3.5 dozen? 12 roses 3.5 doz x ----------------- = doz

16. The mole How many roses in 3.5 dozen? 12 roses 3.5 doz x ----------------- = 42 roses doz

17. The mole How many atoms in 3.5 moles?

18. The mole How many atoms in 3.5 moles? 6.02 x 1023 atoms 3.5 mol x ------------------------- = mol

19. The mole How many atoms in 3.5 moles? 6.02 x 1023 atoms 3.5 mol x ------------------------- = mol 21.1 x 1023 atoms

20. The mole How many atoms in 3.5 moles? 6.02 x 1023 atoms 3.5 mol x ------------------------- = mol 2.11 x 1024 atoms

21. The mole How many moles are 4.5 x 1024 atoms? 1 mol 4.5 1024 x ----------------------- = 6.02 x 1023

22. The mole How many moles are 4.5 x 1024 atoms? 1 mol 4.5 1024 x ----------------------- = 6.02 x 1023 7.48 mol

23. Homework: Problems 1-4 on pages 311-312. Please get started now so that when you get stuck, I’m here to help.