1. 6.3 The Mole “A Chemists Dozen”

3. The Mole – A Chemists Dozen
1 dozen = 12 items 1 six-pack = 1 hour = 1 dollar = 1 mole = 602,000,000,000,000,000,000,000 entities Because atoms and molecules are so small, chemists established their own counting unit – the mole

4. The Mole – A Chemists Dozen
1 dozen = 12 items 1 six-pack = 6 cans 1 hour = 60 minutes 1 dollar = 100 cents 1 mole = 602,000,000,000,000,000,000,000 entities Because atoms and molecules are so small, chemists established their own counting unit – the mole

5. The Mole – A Chemists Dozen
1 dozen = 12 items 1 six-pack = 6 cans 1 hour = 60 minutes 1 dollar = 100 cents 1 mole = 602,000,000,000,000,000,000,000 entities Because atoms and molecules are so small, chemists established their own counting unit – the mole

6. The Mole – A Chemists Dozen
1 dozen = 12 items 1 six-pack = 6 cans 1 hour = 60 minutes 1 dollar = 100 cents 1 mole = 602,000,000,000,000,000,000,000 entities Because atoms and molecules are so small, chemists established their own counting unit – the mole

7. The Mole – A Chemists Dozen
1 dozen = 12 items 1 six-pack = 6 cans 1 hour = 60 minutes 1 dollar = 100 cents 1 mole = 602,000,000,000,000,000,000,000 entities Because atoms and molecules are so small, chemists established their own counting unit – the mole

8. The Mole – A Chemists Dozen
1 dozen = 12 items 1 six-pack = 6 cans 1 hour = 60 minutes 1 dollar = 100 cents 1 mole = 602,000,000,000,000,000,000,000 entities Because atoms and molecules are so small, chemists established their own counting unit – the mole

9. The Mole – A Chemists Dozen
1 dozen = 12 items 1 six-pack = 6 cans 1 hour = 60 minutes 1 dollar = 100 cents 1 mole = 602,000,000,000,000,000,000,000 entities Because atoms and molecules are so small, chemists established their own counting unit – the mole

10. The Mole – A Chemists Dozen
1 dozen = 12 items 1 six-pack = 6 cans 1 hour = 60 minutes 1 dollar = 100 cents 1 mole = 602,000,000,000,000,000,000,000 entities This value, 6.02 x 1023, is called Avogadro’s constant (NA) after the Italian physicist

12. What is a Mole? Mole (n): The SI base unit for an amount of substance
Symbol: mol
1 mol = 6.02 x 1023 entities of a substance
We use a really really big number to measure really really small things!

13. The Mole
Although the mole represents a large number, a mole of atoms, ions or molecules is observable and convenient to measure
1 mol of sugar = 180 g
1 mol of NaCl = g
1 mol of carbon = g

14. Read section 6.2 Questions p. 270 #1-6
Homework
Read section 6.2 Questions p. 270 #1-6