1. Notes #1: Mole Concept
WCHS Chemistry

2. AVOGADRO
Avogadro is credited for the concept of a mole (a.k.a Avogadro’s number)
= the number of atoms in 12 grams of carbon

3. 12 10 2 500 1 mole of anything = 6.02 x 1023 CONVERSATION TIME!
How many items are meant by the following items…
Dozen = ? Pair = ? Decade = ? Ream = ? 12 10 2
500
Chemists use moles to count molecules in chemical reactions!
1 mole of anything = 6.02 x 1023

4. 1 mole of anything = 6.02 x 1023
602,000,000,000,000,000,000,000
Sextillion
Quintillion
Quadrillion
Trillion
Billion
Million
Population of U.S. = 313,914,040
Population of the world = 6,973,738,400
How big is this??
A mole of poppy seeds…
A mole of ping pong balls…
Would fill Lake Erie 400 times!!!
Would cover the U.S. 2,700 miles deep!

5. 1 mole of anything = 6.02 x 1023
602,000,000,000,000,000,000,000
Sextillion
Quintillion
Quadrillion
Trillion
Billion
Million
Population of U.S. = 313,914,040
Population of the world = 6,973,738,400
How big is this??
A mole of popcorn kernels…
would cover the U.S. 9 miles deep

6. RECAP: WHAT AM I SAYING…?
A mole is a HUGE number…
But we use it to count very tiny things called…
molecules!

7. *** 1 mole of a substance = its formula weight!***
Moles = Mass
REMEMBER...
Formula Weight
What if I want one mole of water molecules? 18
1 Mole = _____________
H2O 18
What if I want one mole of salt molecules? 58
1 Mole = _____________
NaCl 58
*** 1 mole of a substance = its formula weight!***