1. Intro to the Mole

2. Think About It
What do the words pair and dozen have in common?

3. I Can…
Determine how many moles or particles are present in a given problem using dimensional analysis
Define what a mole is

4. Notes for Dimensional Analysis
Units MUST Cancel Out Diagonally
UNITS, UNITS, UNITS!!!!!!!!!!
With set-up, as well as the answer 

5. Question
How many molecules are in the beaker of salt?

6. Mole Unit of measurement in Chemistry 6.02 X 1023
Very large number!!!
Also known as Avogadro’s number

7. http://ed.ted.com/lessons/daniel-dulek- how-big-is-a-mole-not-the-animal-the- other-one

8. 1 mole of dollars: $602,000,000,000,000,000,000,000
US National Debt: $19,975,332,990,000
World Population: 7,484,428,900

9. Calculator Magic
Since we are using scientific notation, there is a specific way to type into your calculator
You NEED a scientific calculator
If using your phone, you will need to download a scientific notation app

10. Try it…
2.52 x / x 1011
Correct Answer: x 1013

11. Correct Answer: x 1013
Most common incorrect answer: x 1035

12. Setting Up a Mole Problem
How many atoms are in 2.5 moles of Potassium?

13. Tips
DO NOT memorize how to set up an equation- think about it where the units should be to cancel out
AKA: Don’t think when converting from moles to particles, you should have…

14. Make sure you… Write the units and the chemical formula/element
Round to the correct number of sig figs in your final answer
AKA: lowest amount that you started with

16. Molar Mass The number of grams in 1 mole of a substance Units: g/mol
Physical property
Molar masses are never measured directly. They must be calculated from standard Atomic Masses found on your Periodic Table

17. Mole and Atomic Mass Connection
A mole is defined as the number of carbon atoms in exactly 12.0 grams of carbon-12
1 mole of carbon = 6.02 x 1023 carbon atoms = grams of carbon
Use one decimal place
1 mole = 6.02 x 1023 particles = Molar Mass (g)

18. Example
What is the molar mass of Al(OH)3?

19. Molar Mass of Hydrates
An ionic salt containing water molecules combined in a definite ratio as an integral part of the crystal
Notation: hydrous compound . nH2O
Copper sulfate pentahydrate
CuSO4 . 5H2O

20. Example
What is the molar mass of CuSO4 . 5H2O?