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The highlights are:

1. What is a Mole?

2. Units of measurement

3. Mole conversions

1. What is a Mole?

2. Units of measurement

3. Mole conversions

1.
The Mole

Honors Chemistry

Honors Chemistry

2.
Are these moles?

3.
What is a mole?

A unit of measurement

Since the numbers in chemistry are so small,

we use a “preferred unit of measurement”

(mole) to represent the small number

A unit of measurement

Since the numbers in chemistry are so small,

we use a “preferred unit of measurement”

(mole) to represent the small number

4.
What are the units of

"that equal number" of atoms arbitrarily chosen.

the number of atoms in the atomic weight in g of any

element.

the number of atoms in 16 g of oxygen, in 4 grams

of He, in 32 g of sulfur, etc.

the number of molecules in the molecular weight, in

grams, of any compound.

the number of molecules in 18 g of water, in 40 g of

lithium carbide.

Much later, a mole, that equal number, was found to

be 6.022 x 1023(representative particles).

"that equal number" of atoms arbitrarily chosen.

the number of atoms in the atomic weight in g of any

element.

the number of atoms in 16 g of oxygen, in 4 grams

of He, in 32 g of sulfur, etc.

the number of molecules in the molecular weight, in

grams, of any compound.

the number of molecules in 18 g of water, in 40 g of

lithium carbide.

Much later, a mole, that equal number, was found to

be 6.022 x 1023(representative particles).

5.
1 mole (or abbr. mol) = 12.011 g of Carbon

1 mol of Carbon = 6.02 x 1023 atoms of C

1 mol of H2O = 6.02 x 1023 molecules of water

1 mol of NaCl = 6.02 x 1023 units of NaCl

1 mol of Carbon = 6.02 x 1023 atoms of C

1 mol of H2O = 6.02 x 1023 molecules of water

1 mol of NaCl = 6.02 x 1023 units of NaCl

6.
Figure 8.1: All these samples of pure elements contain the

same number (a mole) of atoms: 6.022 x 10 23 atoms.

Copyright © Houghton Mifflin Company.All rights reserved. 8–5

same number (a mole) of atoms: 6.022 x 10 23 atoms.

Copyright © Houghton Mifflin Company.All rights reserved. 8–5

7.
Moles in mass

1 mole can equal the atomic weight of an

element.

1mol of C = 12.011g of C

1 mole can equal the atomic weight of a

compound

1mol of CO = 12.011g of C + 15.99 g of O

= 28.0 g of CO

1 mole can equal the atomic weight of an

element.

1mol of C = 12.011g of C

1 mole can equal the atomic weight of a

compound

1mol of CO = 12.011g of C + 15.99 g of O

= 28.0 g of CO

8.
Group Whiteboards

How many grams are in 1 mol of

Nitrogen?

Dinitrogen monoxide?

**How many mols are in 100g sample of N2O?

How many grams are in 1 mol of

Nitrogen?

Dinitrogen monoxide?

**How many mols are in 100g sample of N2O?

9.
Warm Up #8

How many grams of Cu are in 1.20 mol of

Cu?

How many moles are in 70g of Cl?

How many grams of Cu are in 1.20 mol of

Cu?

How many moles are in 70g of Cl?

10.
Moles in compounds

Let’s say you have water aka. H2O

How many moles of Hydrogen atoms(ions) are

in water?

Ask yourself how many individual atoms of

Hydrogen do you see in water?

Did you say 2???

Is that your final answer?

You are correct! So how many mols of

Oxygen atoms do you see?

Let’s say you have water aka. H2O

How many moles of Hydrogen atoms(ions) are

in water?

Ask yourself how many individual atoms of

Hydrogen do you see in water?

Did you say 2???

Is that your final answer?

You are correct! So how many mols of

Oxygen atoms do you see?

11.
Moles in an equation

2 H2 + O2 2H2O

How many moles of Hydrogen molecules are in

the reactants?

*Coefficients serve as the number of moles too!

Therefore, there are 2 mols of Hydrogen gas

2 H2 + O2 2H2O

How many moles of Hydrogen molecules are in

the reactants?

*Coefficients serve as the number of moles too!

Therefore, there are 2 mols of Hydrogen gas

12.
Units Mole Conversion

Boomerang

Boomerang

13.
Mole Conversions

Mass to mole or vice versa:

How many moles are in 24 g of Carbon?

Look at the boomerang:

Start with the given: 24 g (mass) of C

What do you want in the end? Moles of C

Use the conversion factor given:

1 mole

Atomic mass

24 g of C x 1 mol of C = 2.0 mol of Carbon

12.011 g of C

Mass to mole or vice versa:

How many moles are in 24 g of Carbon?

Look at the boomerang:

Start with the given: 24 g (mass) of C

What do you want in the end? Moles of C

Use the conversion factor given:

1 mole

Atomic mass

24 g of C x 1 mol of C = 2.0 mol of Carbon

12.011 g of C

14.
Brain Teaser

Given 200 g of water, how many molecules of

water do you have?

How many liters of carbon dioxide are in 1.5 x

10^33 molecules of carbon dioxide?

Given 200 g of water, how many molecules of

water do you have?

How many liters of carbon dioxide are in 1.5 x

10^33 molecules of carbon dioxide?

15.
More conversion

Mole to particles or vice versa

How many atoms are in 2.00 mols of Carbon?

Look at the boomerang:

Where do you begin? (the given: mols)

What do you need in the end? (atoms: particles)

What’s the conversion factor?

6.02 x 1023 Atoms of C

1 Mols of C

2.00 mols of C x 6.02 x 1023 atoms of C = 1.20 x 1024 atoms C

1 mol of C

Mole to particles or vice versa

How many atoms are in 2.00 mols of Carbon?

Look at the boomerang:

Where do you begin? (the given: mols)

What do you need in the end? (atoms: particles)

What’s the conversion factor?

6.02 x 1023 Atoms of C

1 Mols of C

2.00 mols of C x 6.02 x 1023 atoms of C = 1.20 x 1024 atoms C

1 mol of C

16.
White boards

How many molecules of oxygen gas are in

3.0 mols of Oxygen gas?

How many mols of Oxygen gas are in

4.67 x 1024 molecules of Oxygen gas?

How many molecules of oxygen gas are in

3.0 mols of Oxygen gas?

How many mols of Oxygen gas are in

4.67 x 1024 molecules of Oxygen gas?

17.
Final conversion!!!

Mole to moles of atoms or vice versa

If you have 2.00 mols of water, how many

moles of hydrogen atoms are there?

Look at the boomerang:

Mols mols of atoms(ions) CF: mols of H+ atoms

mols of water

2.00 mols of H2O x 2 mols of H+ atoms =

1 mol of H2O

= 4.00 mols of H+ atoms

Mole to moles of atoms or vice versa

If you have 2.00 mols of water, how many

moles of hydrogen atoms are there?

Look at the boomerang:

Mols mols of atoms(ions) CF: mols of H+ atoms

mols of water

2.00 mols of H2O x 2 mols of H+ atoms =

1 mol of H2O

= 4.00 mols of H+ atoms

18.
Final conversion!!!

Mole to Volume (gas) or vice versa

Any gas at STP (standard temperature and

pressure) has a volume of 22.4L per mole

Look at the cloud chart:

Mols volume of gas CF: Moles of gas

22.4L of gas

Ex. How much volume of gas is in 5.00 moles of H2?

5.00 moles H2 x 22.4 L of H2 = 122 L of H2

1 mole of H2

Mole to Volume (gas) or vice versa

Any gas at STP (standard temperature and

pressure) has a volume of 22.4L per mole

Look at the cloud chart:

Mols volume of gas CF: Moles of gas

22.4L of gas

Ex. How much volume of gas is in 5.00 moles of H2?

5.00 moles H2 x 22.4 L of H2 = 122 L of H2

1 mole of H2

19.
Rally table

Must show work (dimensional analysis)

How many grams are in 1 mol of Mercury?

Given a 1.5 mols of carbon dioxide, how

many molecules of carbon dioxide do you

have?

Given 3.00 mols of carbon tetraflouride, how

many mols of Flourine atoms are there in a

compound?

Must show work (dimensional analysis)

How many grams are in 1 mol of Mercury?

Given a 1.5 mols of carbon dioxide, how

many molecules of carbon dioxide do you

have?

Given 3.00 mols of carbon tetraflouride, how

many mols of Flourine atoms are there in a

compound?