1. LECTURE 4.2 – THE MOLE

2. Today’s Learning Targets
LT 3.4 – I can discuss the concept of a mole, the number that it represents, and how the overall size of it can vary between substances

3. What is the mole?

4. I. The Mole In any substance there are trillions of atoms
We need a simple way of conveying large numbers
The mole is a unit that describes the amount of particles that a substance has.
Contained within one mole is x 1023 particles

5. How High Can You Count?
602,200,000,000,000,000,000,000

6. What is Avogadro’s Number ?

7. I. Avogadro’s Number Italian chemist who studied gases
From his experiments, he developed the idea of the mole

8. II. The Mole The mole is simply a number.
This is just like the concept of a dozen
You can have dozen dogs or dozen chairs, each describes that we have 12 off them.
A mole is simply x 1023 of something. This means we could have a mole of atoms or a mole of M & Ms. Each means that we have x 1023 of them

9. What does 1 mole look like?