1. What is a mole?

2. A mole is a way of measuring. There are many kinds of measurements in the world. We all know that a dozen = 12 This can be a dozen of anything. A dozen eggs, a dozen donuts. A dozen objects are not necessarily the same size, just the same number.

3. What is a mole? 1 mole = 602,000,000,000,000,000,000,000 particles (these can be ions, molecules, formula units, etc) mole = 6.02 x10 23

4. A Mole of Atoms & Molecules 1 mole of copper How many atoms of Cu are in the bottle? 1 mole of H 2 O How many molecules of H 2 O are in the bottle? A mole is a fixed number of things just as a dozen is. …so how can we count out a mole of molecules? mole = 6.02 x10 23 mole = 6.02 x10 23

5. How long it would take to count out a mole of marble chips? 1.One student will count the lentils as quickly as possible, while the other records the time in seconds. 2.Write the times on the chalkboard. 3.Average the class times. 4.How many years would it take to count out a mole of marble chips?

6. Moles Is it reasonable to count out a mole of lentils? Of anything? So how can we figure out how much a mole of something is?

7. Molar Mass = Atomic Mass A mole of each atom happens to have that same mass in grams. Where can you find the mass of atoms?

8. Molar Mass Molar Mass What is the mass of a mole of Cu? 1 mole of Cu = 63.55 g Cu = 6.02 x 10 23 atoms Cu Atomic mass

9. What is the mass of a mole of CO 2 ? 1 mol of C = 12.01 g C 2 mol of O = (16.00 x 2) = 32.00 g O Molar Mass of CO 2 = 32.00 + 12.01 = 44.01 g of CO 2

10. Definition of Mole Base unit for the amount of substances. The number of atoms in exactly 12 g of pure carbon-12.

11. Mole Recap A mole is 6.02 x10 23 particles. (Just like a dozen is 12 objects.) The molar mass of an atom, molecule, or formula unit can be found by using the atomic mass of the atom or atoms of the substance.

12. A mole is a way of measuring. How many eggs are in 12 dozen eggs? You know how to do this, it is easy. 12 dozen X 12 eggs = ______________eggs 1 dozen Conversion factor

13. You must know these relationships!! 1 mole = 6.02 x 10 23 atoms, particles, molecules, whatever! = Molar mass in grams (use periodic table)