Today we will:

Learn about the mole

Today we will:

Today we will:

Counting units: • pair

• dozen

• score

• gross

• ream

• mole

Counting units: • pair 2

• dozen

• score

• gross

• ream

• mole

Counting units: • pair 2

• dozen 12

• score

• gross

• ream

• mole

Counting units: • pair 2

• dozen 12

• score 20

• gross

• ream

• mole

Counting units: • pair 2

• dozen 12

• score 20

• gross 144

• ream

• mole

Counting units: • pair 2

• dozen 12

• score 20

• gross 144

• ream 500

• mole

Counting units: • pair 2

• dozen 12

• score 20

• gross 144

• ream 500

• mole602213670000000000000000

Counting units: • pair 2

• dozen 12

• score 20

• gross 144

• ream 500

• mole 6.02 x 1023

The mole

1 mole = 6.02 x 1023

The mole

The mole, also called Avogadro's number, is the SI unit for the amount of a substance.

The moleHow many roses in 3.5 dozen?

The moleHow many roses in 3.5 dozen?

12 roses

3.5 doz x ----------------- =

doz

The moleHow many roses in 3.5 dozen?

12 roses

3.5 doz x ----------------- = 42 roses

doz

The moleHow many atoms in 3.5 moles?

The moleHow many atoms in 3.5 moles?

6.02 x 1023 atoms

3.5 mol x ------------------------- =

mol

The moleHow many atoms in 3.5 moles?

6.02 x 1023 atoms

3.5 mol x ------------------------- =

mol

21.1 x 1023 atoms

The moleHow many atoms in 3.5 moles?

6.02 x 1023 atoms

3.5 mol x ------------------------- =

mol

2.11 x 1024 atoms

The moleHow many moles are 4.5 x 1024 atoms?

1 mol

4.5 1024 x ----------------------- = 6.02 x 1023

The moleHow many moles are 4.5 x 1024 atoms?

1 mol

4.5 1024 x ----------------------- = 6.02 x 1023

7.48 mol

Homework: Problems 1-4 on pages 311-312.

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