1. The Mole and Molar Mass

2. The Mole, Chemistry's Mascot

3. Units of Measurement Fundamental Units Dozen = 12 things
Bakers dozen= 13 things
Pair= 2 things
Decade = 10 years
Gross = 144 things
Ream = 100 things
I Mole = 6.02 x 1023 things

4. I Mole = 6.02 x 1023 This is a huge number!
How long would it take to spend a mole of pennies …. at a $million /day?
How long is a mole of seconds?

5. Why use this value?
It makes conversions to mass easy since one mole of protons has a mass of one gram!
The molar mass (mass of one mole) of a substance is the same value as the formula mass but in grams instead of amu.

6. B. Molar Mass Examples carbon aluminum zinc 12.01 g/mol 26.98 g/mol

7. B. Molar Mass Examples water sodium chloride H2O
2(1.01) = g/mol
NaCl
= g/mol

8. B. Molar Mass Examples sodium bicarbonate sucrose NaHCO3
(16.00) = g/mol
C12H22O11
12(12.01) + 22(1.01) + 11(16.00) = g/mol

9. Measuring with Moles The Mole is a counting unit
Called the chemist’s dozen
Used to count number of
Atoms
Molecules (nm + nm) or (m + nm)
We will count both atoms and molecules

10. Conversions with Moles
How do you find mass of one mole of substance?
We can do this if we know the formula mass
When we do this we get the MOLAR MASS
The mass in grams of 1 mole of substance is equal to the formula mass
Units: grams/mol

11. Conversions with Moles
Mass
= number of moles
Molar mass

12. Super Mole Highway So Far we Can Convert Between
Moles
Grams
Particles
The Mole Highway will help us convert from one to another

13. Super Mole Highway molar mass 6.02  1023 MOLES (g/mol)IN
GRAMS
MOLES
NUMBER OF
PARTICLES
(g/mol)
(particles/mol)