The Mole

A chemical quantity equal to:

6.02 x 1023 particles
The
atomic mass of any element
The
molecular mass of any compound
22.4
Liters of any gas
Mole Song
Finding each of these quantities:

Particles- This is a count.
If we had a mole of pennies, we’d have
602 000 000 000 000 000 000 000 pennies.
That would be 6.02 sextillion dollars!
(Everyone on earth would be a trillionaire)
Would you believe a mole of atoms would fit in the palm
of your hand? Think about it.
Gram Atomic Mass

This is found by using your periodic table.
11
The gram atomic mass of any element
is equal to 1 mole.
Na
22.990
Q. How many atoms of sodium will have a
mass of 22.990 grams?
6.02 x 1023
Molecular Mass

This is the mass of 1 molecule of a compound.
We calculate this by adding up the individual
atoms that make up a molecule.
1 atom Oxygen
= 1 x 16 grams
2 atoms Hydrogen = 2 x
H2O
Mass of Molecule
=
1 gram
18 grams
A mole of gas

Any gas will have an exact volume of 22.4 Liters
at 0° C and 1 atm. (STP)
22.4 Liters
Oxygen
22.4 Liters
Helium
1 mole
Q. Would these 2 gasses have the same mass?
No. The atomic masses are different.
Mole Island
Conversions
Grams to Moles
Divide the given amount by the atomic mass
or molecular mass of the substance.
Ex:
12 grams He x 1 mole He = 3 moles He
4 grams He
Atomic mass of Helium
Moles to Grams
• Multiply the given amount by the atomic
mass or molecular mass of the substance.
Ex:
3 moles Na x 23 grams Na = 73.6 grams Na
1 mole Na
Volume to Moles
• Convert the given volume to Liters if
needed.
• Divide the given amount by 22.4 Liters
Ex:
2 Liters O2 x 1 mole O2 = 0.09 moles O2
22.4 L O2
Moles to Volume
• Multiply the given amount by 22.4 Liters.
Ex:
3 moles Ne
x
22.4 L Ne = 67.2 L Ne
1 mole Ne
Particles to Moles
• Divide the given amount by 6.02 x 1023
particles.
Ex.
2 x 1010 atoms x
1 mole
= 3.3 x 10-14 moles
6.02 x 1023atoms
Moles to Particles
• Multiply the given amount by 6.02 x 1023
Ex:
12 moles x 6.02 x 1023 atoms = 7.2 x 1024 atoms
1 mole
The Mole Island Table