2. Mole A mole is just a number pair = 2 trio = 3 quartet = 4 dozen = 12
mole = (mol)
Mole
A mole is just a number
pair = 2
trio = 3
quartet = 4
dozen = 12
baker’s dozen = 13
gross = 144

3. Avogadro’s Number
6.02x1023

4. 9.12 x 1013 How BIG is a mole? There are ~ 6.6 billion people on Earth
How many Earths would it take to equal the population of 1 mole?
9.12 x 1013

5. If you had a mole of cats . . .
They would create a sphere
larger than Earth!

6. If you had a mole of $$$$$ and you spent $800 billion dollars a day how many years would it take to spend a MOLEion dollars?
2.06 x 109 years

8. If you had a mole of H2O could you swim in it?

9. Water molecules are so small
NO!
Water molecules are so small
that a mole of H2O = 18ml

10. How small are atoms?
There are more atoms in one gram of salt than grains of sand on all the beaches of all the oceans in all the world.

11. Just one granule of sugar contains 1 x 1017 molecules
Each time you take a breath of air, you inhale about 2 x 1022 molecules of nitrogen and 5 x 1021 molecules of oxygen.

12. In chemistry we don’t work with individual atoms or molecules because they are too small to be weighed or measured
We have to work with LOTS of atoms in order to measure them
THAT’s WHERE THE
MOLE COMES IN!

14. The next slide is SO important to chemistry.

15. of the in
Gram ATOMic Mass
mass in grams of 1 mole of atoms of an element
In other words……
1 mol C atoms = 6.02 x C atoms = 12g C

16. Practice Remember. 1 mole = 6
Practice Remember mole = 6.02x1023 atoms or molecules = ______ g from the periodic table

17. Stoichiometry of Chemical Formulas

18. Gram Formula Mass Gram Molecular Mass Molar Mass
of the in
Gram Formula Mass Gram Molecular Mass Molar Mass
mass in grams of 1 mole of a substance
In other words Add it all up!
1 mole of NaCl = 58g = 6.02x1023 particles of NaCl
1 mole of H2O = 18g = 6.02x1023 molecules of H20

19. Now….. Use the gram formula mass and the gram atomic mass to determine
how many moles or atoms of an element are found in some mass of a substance
how much mass that element contributes to the mass of the entire substance
Use factor label & follow the units!

20. Stoichiometry of Chemical Formulas
If you have 1 molecule of (NH4)2SO4
How many atoms of N are there?
How many atoms of H?
SO…..
If you have 1 mole of of (NH4)2SO4
How many moles of N are there?
How many moles of H?

21. Practice Remember. 1 mole = 6
Practice Remember mole = 6.02x1023 atoms or molecules = ______ gfm from the pt

22. 1 mole = 6.02x1023 atoms or molecules = gfm = 22.4L (g)
Remember . . .
1 mole = 6.02x1023 atoms or molecules = gfm = 22.4L (g)

23. The End