1. Us ing
Convers ion
Factors

2. Ju s t like a dozen re p re s e nts 1 2 of s om e th ing,
s u ch as d onu ts , igu anas , ch e m is try as s ignm e nts , e tc.,
a mole als o re p re s e nts an am ou nt of s om e th ing.
It is 6.02 x 1 0 23 of s om e th ing. A m ole can
re p re s e nt 6.02 x 1 0 d onu ts , igu anas , toe s , e tc.
23
In ch e m is try, it is norm ally u s e d to re p re s e nt
an am ou nt of atom s , ions , m ole cu le s , or form u la
u nits .
C olle ctive ly, atom s , ions , m ole cu le s , or form u la
u nits are calle d re p re se ntative p articl s . e

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 O
H
from mass H
to moles
to particles
to volume
and back again
to any unit of measurement desired

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

7. m as s
m olar m as s
1 m ol 1 m ol
m olar m as s
m oles
1 m ol
6 .02 x 10 23 particles
22.4L
1 m ol 1 m ol
22.4L
6.02 x 10 23 particles
1 m ol
volum e
at S TP num ber of
repres entative
particles

8. m as s
m olar m as s
1 m ol 1 m ol
m olar m as s
m oles
1 m ol
6 .02 x 10 23 particles
22.4L
1 m ol 1 m ol
22.4L
6.02 x 10 23 particles
1 m ol
volum e
at S TP num ber of
repres entative
particles

9. m as s
m olar m as s
1 m ol 1 m ol
m olar m as s
m oles
1 m ol
6 .02 x 10 23 particles
22.4L
1 m ol 1 m ol
22.4L
6.02 x 10 23 particles
1 m ol
volum e
at S TP num ber of
repres entative
particles

10. m a ss
m olar m as s
1 m ol 1 m ol
m olar m as s
m oles
1 m ol
6 .02 x 10 23 particles
22.4L
1 m ol 1 m ol
22.4L
6.02 x 10 23 particles
1 m ol
volum e
at S TP num ber of
repres entative
particles

11. m a ss
m olar m as s
1 m ol 1 m ol
m olar m as s
m o le s
1 m ol
6.02 x 10 23 particles
22.4L
1 m ol 1 m ol
22.4L
6.02 x 10 23 particles
1 m ol
volum e
at S TP num ber of
repres entative
particles

12. m a ss
m olar m as s
1 m ol 1 m ol
m olar m as s
m o le s
1 m ol
6.02 x 10 23 particles
22.4L
1 m ol 1 m ol
22.4L
6.02 x 10 23 particles
1 m ol
volum e
at S TP num ber of
repres entative
particles

13. m a ss
m olar m as s
1 m ol 1 m ol
m olar m as s
m o le s
1 m ol
6.02 x 10 23 particles
22.4L
1 m ol 1 m ol
22.4L
6.02 x 10 23 particles
1 m ol
volum e
at S TP num ber of
repres entative
particles

14. m a ss
m olar m as s
1 m ol 1 m ol
m olar m as s
m o le s
1 m ol
6.02 x 10 23 particles
22.4L
1 m ol 1 m ol
22.4L
6.02 x 10 23 particles
1 m ol
volum e
at S TP num ber of
repres entative
particles

15. 35 g Al m a ss
m olar m as s
1 m ol 1 m ol
m olar m as s
m oles
1 m ol
6 .02 x 10 23 particles
22.4L
1 m ol 1 m ol
22.4L
6.02 x 10 23 particles
1 m ol
volum e
at S TP num ber of
repres entative
particles

16. 35 g Al m a ss
m olar m as s
1 m ol 1 m ol
m olar m as s
? moles Al m o le s
1 m ol
6.02 x 10 23 particles
22.4L
1 m ol 1 m ol
22.4L
6.02 x 10 23 particles
1 m ol
volum e
at S TP num ber of
repres entative
particles

17. 35 g Al x 1 mol m a ss
27 g
m olar m as s
1 m ol 1 m ol
m olar m as s
m o le s
1 m ol
6.02 x 10 23 particles
22.4L
1 m ol 1 m ol
22.4L
6.02 x 10 23 particles
1 m ol
volum e
at S TP num ber of
repres entative
particles

18. 35 g Al x 1 mol m a ss
27 g
35 g Al x 1 mol m olar m as s
= 1 m ol 1 m ol
27g m olar m as s
m o le s
1 m ol
6.02 x 10 23 particles
22.4L
1 m ol 1 m ol
22.4L
6.02 x 10 23 particles
1 m ol
volum e
at S TP num ber of
repres entative
particles

19. 35 g Al x 1 mol m a ss
27 g
35 mol Al m olar m as s
= 1 m ol 1 m ol
27 m olar m as s
= 1.3 mols Al m o le s
1 m ol
6.02 x 10 23 particles
22.4L
1 m ol 1 m ol
22.4L
6.02 x 10 23 particles
1 m ol
volum e
at S TP num ber of
repres entative
particles

20. m a ss ? mass SiO2
m olar m as s
1 m ol 1 m ol
m olar m as s
m o le s 0.8 moles SiO2
1 m ol
6.02 x 10 23 particles
22.4L
1 m ol 1 m ol
22.4L
6.02 x 10 23 particles
1 m ol
volum e
at S TP num ber of
repres entative
particles

21. m a ss ? mass SiO2
m olar m as s
1 m ol 1 m ol
m olar m as s
m o le s 0.8 moles SiO2
1 m ol
6.02 x 10 23 particles
22.4L
1 m ol 1 m ol
22.4L
6.02 x 10 23 particles
1 m ol
volum e
at S TP num ber of
repres entative
particles

22. 60.1 g SiO2
m a ss 0.8 moles SiO2 x
1 mole SiO2
m olar m as s = 0.8 x 60.1 g SiO2
1 m ol 1 m ol
m olar m as s = 48.1 g SiO2
m o le s
1 m ol
6.02 x 10 23 particles
22.4L
1 m ol 1 m ol
22.4L
6.02 x 10 23 particles
1 m ol
volum e
at S TP num ber of
repres entative
particles

23. m as s
m olar m as s
1 m ol 1 m ol
m olar m as s
m oles
1 m ol
6.02 x 10 23 particles
22.4L
1 m ol 1 m ol
22.4L
6.02 x 10 23 particles
1 m ol
volum e
at S TP num ber of
r e p r e s e n t a t iv e
p a r t ic le s

24. 200 g N2O
m a ss
m olar m as s
1 m ol 1 m ol
m olar m as s
m o le s
1 m ol
6.02 x 10 23 particles
22.4L
1 m ol 1 m ol
22.4L
6.02 x 10 23 particles
1 m ol
volum e
at S TP num ber of
r e p r e s e n t a t i v e ? molecules N2O
p a r tic le s

25. 200 g N2O
m a ss
m olar m as s
1 m ol 1 m ol
m olar m as s
m o le s
1 m ol
6.02 x 10 23 particles
22.4L
1 m ol 1 m ol
22.4L
6.02 x 10 23 particles
1 m ol
volum e
at S TP num ber of
r e p r e s e n ta tiv e ? molecules N2O
p a r tic le s

26. 1 mole N2O 6.02 x 1023 molecules N2O
200 g N2O x x
44.0 g N2O 1 mole N2O
m a ss 200 x 6.02 x 1023 molecules N2O
=
44.0
m olar m as s 24
1 m ol 1 m ol = 2.74 x 10 molecules N2O
m olar m as s
this
m o le s is so
1 m ol
6.02 x 10 23 particles
22.4L
1 m ol 1 m ol cool!
22.4L
6.02 x 10 23 particles
!
1 m ol
volum e
at S TP num ber of
r e p r e s e n ta tiv e
p a r tic le s