This document discusses moles, atoms, molecules, and conversions between moles, mass, and number of particles. It defines a mole as the amount of a substance with the same number of particles as 12 grams of carbon-12. It states that one mole contains 6.022 x 10^23 particles, known as Avogadro's number. The mass of one mole of a substance is equal to its atomic or molecular mass. Examples are given of converting between moles and mass or number of particles.

2. Small
Large
in
number
Difficult
to
count
Difficult
to
weigh
ATOM

3. One
mole
of
substance
is
the
amount
of
substance
that
has
the
same
number
of
par<cles
as
there
are
in
12g
of
Carbon-­‐12.
Mole

4. Like :!
!
1 dozen = 12!
1 pair = 2!
!
Similarly:!
1 mole = 6.022 x 10 23 of anything!
!

5. What is Avogadro
number?
Avogadro number = 6.022 x
10 23!

6. What is Atomic
Mass in terms of
moles?
Mass of 1 mole of atoms =
Atomic mass!

7. What is Molecular
mass in terms of
moles?
Mass of 1 mole of
molecules = molecular mass!

8. Conversions-­‐
Mole
and
Mass

9. Conversions-­‐
Mole
and
Mass
How many moles of Carbon are present in
24 grams of Carbon?!

10. Conversions-­‐
Mole
and
Number
of
atoms/molecules

11. Conversions-­‐
Mole
and
Number
of
atoms/molecules
How many atoms of Carbon are present in
2 moles of Carbon?!