1. Bell Work Name At Least 4 Types of Representative Particles….. Atom
Ion
Molecule
formula unit
electron

2. CORNELL NOTES/PAGE 65 OF SN
ATOMS AND MOLES
CORNELL NOTES/PAGE 65 OF SN

3. OBJECTIVES: Understand the concept of Moles
Understand the concept of Avogadro’s Number.
Learn to calculate molar mass and mass using Avogadro’s Number

4. What is a Mole? The SI unit used to measure the amount of a substance.
The number of atoms in exactly 12 grams of carbon-12.
Can be abbreviated as - mol

5. What is a Mole used for? Used as a counting unit Example:
12 eggs = 1 dozen
Chemist use 1 mol of carbon or 2 mol of iron

6. What is Molar Mass? The mass in grams of one mole of the element.
The units for Molar Mass – g/mol
The mass in grams of 1 mol of an element is equal to the element’s atomic mass

7. Example of Molar Mass
The Atomic Mass number of copper rounded to two decimal places is amu (atomic mass units)
Therefore, the molar mass of copper is g/mol

8. What is Avogadro’s Number?
The number of particles present in 1 mol of any substance.
1 mole of pure substance contains X 1023.
The number will be rounded during calculations to 6.02 X 1023.

9. Converting from R.P. to Moles
# of
Representative x 1mol
particles x Representative
particles

10. Converting from moles to R.P.
# of moles x x 1023 Representative Particles
1mol

11. Guided & Independent Practice
Page 323; 1, 2, 3,

12. Ticket –Out-The-Door
What is a representative particle?

13. Homework: engrade.com
Moles Homework: Quiz

14. Calculations Using Moles
If you want to end up with mass:
(number of moles given) x (grams/1mol)

15. Calculations Using Moles
If you want to end up with moles:
(grams of substance) X (1mol/gram of substance)

16. CALCULATIONS: PLEASE TURN TO PAGE 102 IN YOUR TEXT BOOK.
PLEASE FOLLOW ALONG AS I EXPLAIN THE EXAMPLE

17. PRACTICE:
COMPLETE PROBLEMS #1- 4 ON PAGE 102 OF TEXT. PAGE 32 OF SN.