“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 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

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 1021

6.02 x 1023¢100¢$1

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

$94,000

day

365 days

year

= 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 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

cm

0.01 m= 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 pagespage

0.000065 m= 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

380,000,000 m

stack= 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 AC20H30O

Determine the Molecular Mass of Vitamin AC20H30O

20 x 12.0 = 240.030 x 1.0 = 30.01 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 PhosphateCa3(PO4)2

3 x 40.1 = 120.32 x 31.0 = 62.08 x 16.0 = 128.0 = 310.3 amu

Homework

• Molecular and Formula Mass Worksheet.• Don’t forget to show your work on your

calculations.