1. Today we will: Learn about the mole

2. Today we will:

4. Counting units: pair dozen score gross ream mole

5. Counting units: pair2 dozen score gross ream mole

6. Counting units: pair2 dozen12 score gross ream mole

7. Counting units: pair2 dozen12 score20 gross ream mole

8. Counting units: pair2 dozen12 score20 gross144 ream mole

9. Counting units: pair2 dozen12 score20 gross144 ream500 mole

10. Counting units: pair2 dozen12 score20 gross144 ream500 mole602213670000000000000000

11. Counting units: pair2 dozen12 score20 gross144 ream500 mole6.02 x 10 23

12. The mole 1 mole = 6.02 x 10 23

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 10 23 atoms 3.5 mol x ------------------------- = mol

19. The mole How many atoms in 3.5 moles? 6.02 x 10 23 atoms 3.5 mol x ------------------------- = mol 21.1 x 10 23 atoms

20. The mole How many atoms in 3.5 moles? 6.02 x 10 23 atoms 3.5 mol x ------------------------- = mol 2.11 x 10 24 atoms

21. The mole How many moles are 4.5 x 10 24 atoms? 1 mol 4.5 10 24 x ----------------------- = 6.02 x 10 23

22. The mole How many moles are 4.5 x 10 24 atoms? 1 mol 4.5 10 24 x ----------------------- = 6.02 x 10 23 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.