1. Using
Conversion
Factors

2. Just like a dozen represents 12 of something,
such as donuts, iguanas, chemistry assignments, etc.,
a mole also represents an amount of something.
It is 6.02 x of something. A mole can
represent 6.02 x donuts, iguanas, toes, etc.
In chemistry, it is normally used to represent
an amount of atoms, ions, molecules, or formula
units.
Collectively, atoms, ions, molecules, or formula
units are called representative particles. 23

3. Because chemists deal with such
large amounts of particles,
it is easier to work with moles of particles

4. amounts of particles can be expressed
not only as moles,
but as mass (grams),
as volume (liters), and
as individual particles (atoms, molecules,
ions, formula units, etc.)

5. a measurement of a sample of a molecule, H2O for example,
can be converted
from mass
to moles
to particles
to volume
and back again
to any unit of measurement desired O H

6. using
the right
conversion
factors
this is so cool!!

15. 35 g Al

16. 35 g Al
? moles Al

17. 1 mol
35 g Al x
27 g

18. 1 mol
35 g Al x
27 g
35 g Al x 1 mol
27g =

19. 1 mol
35 g Al x
27 g
35 mol Al 27 = =
1.3 mols Al

20. ? mass SiO2
0.8 moles SiO2

21. ? mass SiO2
0.8 moles SiO2

22. 0.8 moles SiO2 x
60.1 g SiO2
1 mole SiO2
= x g SiO2
= g SiO2

24. 200 g N2O
? molecules N2O

25. 200 g N2O
? molecules N2O

26. 200 g N2O x x 1 mole N2O 6.02 x 10 molecules N2O 44.0 g N2O 1 mole N2O23
200 x 6.02 x molecules N2O
44.0 23 =
= x molecules N2O 24
this is so cool!!