### How Big is a Mole Worksheet

```“How Big is a Mole
Worksheet”
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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
The Mole (mol)
• 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
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?
\$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 910 billion dollars if you spent \$100,000
per day?
\$8.6 x 1011
day
\$94,000
year
365 days
= 25,000 years
Neanderthals died out about 25,000 years ago
wish,
what would it
be?
Would you wish to be a “millionaire”?
“Mollionaire”
Finish the “How Big is a Mole
The thickness of one page in your chemistry
notebook is about 0.0065 cm. How many
meters is this?
What is the thickness of one page in your
chemistry notebook 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.
Atomic, Molecular
& Formula
Masses
When using
atomic masses
make sure to
round to at least
one decimal
place.
What is the
atomic mass of
actinium (Ac)?
227.0278
227.0
What is the
atomic mass of
hydrogen (H)?
1.00794
1.0
What is the mass
of hydrogen (H2)?
2.0
Vitamin A: C20H30O
The first of the 13 vitamins to be discovered,
it plays a vital role in the growth and repair
of body tissues, and is particularly
important in maintaining good eyesight and
healthy skin, as well as aiding in bone and
teeth formation.
Vitamin A-rich foods include: Liver, sweet
potatoes, carrots, mangoes, spinach,
cantaloupe, dried apricots, milk, egg yolks,
mozarella cheese.
Determine the
Molecular Mass of
Vitamin A
C20H30O
Determine the
Molecular Mass of
Vitamin A
C20H30O
20 x 12.0 = 240.0
30 x 1.0 = 30.0
1 x 16.0 = 16.0
= 286.0 amu
H
H2O
NaCl
• H is an atom and it would therefore have an
atomic mass.
• H2O is a molecule and it would therefore have
a molecular mass.
• NaCl is neither an atom or a molecule and
would therefore have a formula mass.
Formula Mass
• The formula mass is the mass of an ionic
compound.
• An ionic compound is formed from a
combination of metals and nonmetals.
• Formula masses are calculated the same as
molecular masses.
Determine the
Formula Mass of
Calcium Phosphate
Ca3(PO4)2
3 x 40.1 = 120.3
2 x 31.0 = 62.0
8 x 16.0 = 128.0
= 310.3 amu
Homework
• Molecular and Formula Mass Worksheet.
• Don’t forget to show your work on your
calculations.
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