What Is A Mole?

1. What Is A Mole? • A mole is set by using the standard 12 grams of carbon-12 like 12.93 grams of Nerds

2. What Is A Mole? • 1 mole is a very big number 602000000000000000000000 or 6.02 X 1023 • This is like saying 1 dozen is 12, or 1 serd is 168

3. What Is A Mole? • 1 mole = 6.02 X 1023 representative particles • Representative particles are atoms, molecules, ions, or formula units • How many atoms are in 1 mole of magnesium? • 6.02 X 1023 CO2 molecules is how many moles?

4. Molar Mass • The mass of 1 mole of any substance • It is calculated by looking at the atomic mass of an element or elements on the periodic table • Then multiply by how many you have and add the total

5. Example H2 O H 1.0 X 2 hydrogens = 2.0 O 16.0 X 1 oxygen = +16.0 18.0 g/mol the units are grams 1 mol

6. Example H2 O H 1.0 X 2 hydrogens = 2.0 O 16.0 X 1 oxygen = +16.0 18.0 g/mol the units are grams 1 mol

7. Mole Conversions • Mass to moles or moles to mass Use molar mass (periodic table) Example : How many moles are in 3.0 g of water?

8. 3.0 g H2 O

9. 3.0 g H2 O

10. 3.0 g H2 O g H2 O

11. 3.0 g H2 O mol H2 O g H2 O

12. 3.0 g H2 O 1 mol H2 O 18.0 g H2 O

13. 3.0 g H2 O 1 mol H2 O 18.0 g H2 O

14. 3.0 g H2 O 1 mol H2 O = 0.17 mol H2 O 18.0 g H2 O

15. Mole Conversions • Moles to Number of Atoms, Molecules, Formula Units or the reverse Use Avogadro’s number 6.02 X 1023 Example : How many molecules are in 2.0 moles H2 O?

16. 2.0 moles H2 O

17. 2.0 moles H2 O 1 mole H2 O

18. 2.0 moles H2 O 6.0 X 1023 molecules H2 O 1 mole H2 O

19. 2.0 moles H2 O 6.0 X 1023 molecules H2 O 1 mole H2 O = 1.2 X 1024 molecules H2 O

20. Mole Conversions • Moles to Volume of a gas or volume of a gas to moles Use molar volume 22.4 L/mol (liter/1mole) Example: How many moles are in 11.2 L of oxygen gas?

21. 11.2 L O2 22.4 L O2

22. 11.2 L O2 1 mole O2 22.4 L O2

23. 11.2 L O2 1 mole O2 = 0.5 moles O2 22.4 L O2