The Mole
The Mole
• A counting unit similar to a dozen, except
instead of 12, it’s 602 billion trillion
• 602,000,000,000,000,000,000,000
• 6.02 X 1023 (in scientific notation)
• This number is named in honor of Amedeo
Avogadro (1776 – 1856), and is called
Avogadro’s Number.
The Mole (mol)
• 1 mole of cookies = 6.02 x 1023 cookies
• 1 mole of cars = 6.02 x 1023 cars
•
•
•
•
1 mole of Al = 6.02 x 1023 ?
1 mole of Al = 6.02 x 1023 Al atoms
1 mole of water = ?
1 mole of H2O = 6.02 x 1023 H2O molecules
Mole Worksheet
“How Big is a Mole”
Find This Worksheet
In Your Notebook
How big is a mole?
• How many cents are in one mole of pennies?
How big is a mole?
• How many cents are in one mole of pennies?
6.02 x 1023¢
How big is a mole?
• How many dollars are in 6.02 x 1023¢?
How big is a mole?
• How many dollars are in 6.02 x 1023¢?
6.02 x 1023¢
$1
100¢
= $6.02 x 1021
How big is a mole?
• There are about 7.0 billion (7.0 x 109) people on earth.
• If we divided the 1 mole of pennies ($6.02 x 1021) equally
among all the people on earth how many dollars would you
have?
How big is a mole?
• There are about 7.0 billion (7.0 x 109) people on earth.
• If we divided the 1 mole of pennies ($6.02 x 1021) equally
among all the people on earth how many dollars would you
have?
$8.6 x
11
10 /person
How big is a mole?
• There are about 7.0 billion (7.0 x 109) people on earth.
• If we divided the 1 mole of pennies ($6.02 x 1021) equally
among all the people on earth how many dollars would you
have?
$6.02 x 1021
7.0 x 109 people
= $8.6 x 1011/person
$860,000,000,000 = 860 billion dollars
How big is a mole?
• How many years would it take you to spend
your 860 billion dollars ($8.6 x 1011) if you spent
$94,000 per day?
How big is a mole?
• How many years would it take you to spend
your 860 billion dollars ($8.6 x 1011) if you spent
$94,000 per day?
25,000 years
How big is a mole?
• How many years would it take you to spend
your 860 billion dollars if you spent $94,000
per day?
$8.6 x 1011
day
$94,000
year
365 days
= 25,000 years
Neanderthals died out about 25,000 years ago
If you had one
wish,
what would it
be?
Would you wish to be a “millionaire”?
“Mollionaire”
Finish the “How Big is a Mole
Worksheet” with your lab partner.
The thickness of one page in your chemistry
textbook is about 0.0065 cm. How many
meters is this?
What is the thickness of one page in your
chemistry book in meters?
0.0065 cm
0.01 m
cm
= 0.000065 m
How many meters high would a stack of
one mole of pages be?
How many meters high would a stack of
one mole of pages be?
6.02 x 1023 pages
0.000065 m
page
= 3.9 x 1019 m
The distance to the moon is 380,000,000m. If you took your stack
of papers from problem 6 and broke it down into smaller stacks,
how many stacks of papers could you make from the earth to the
moon?
The distance to the moon is 380,000,000m. If you took the 3.9 x 1019
m stack of papers, how many stacks of papers could be made from the
earth to the moon?
3.9 x 1019 m
stack
380,000,000 m
= 1.0 x 1011 stacks
1.0 x 1011 stacks = 100,000,000,000 stacks
1 mole of pages
would be enough to
build 100 billion
stacks of paper to the
moon.
Homework
 Homework: Factor Label Problems
Worksheet (problems 1 – 10).
Homework
 Homework: Factor Label Method Worksheet 2.
 The equalities below will be useful for this
assignment:
L = dm3
ml = cm3