the mole final exam review. counting units: pair dozen gross ream mole
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The Mole
Final Exam Review
Counting units: • pair
• dozen
• gross
• ream
• mole
Counting units: • pair 2
• dozen
• gross
• ream
• mole
Counting units: • pair 2
• dozen 12
• gross
• ream
• mole
Counting units: • pair 2
• dozen 12
• gross 144
• ream
• mole
Counting units: • pair 2
• dozen 12
• gross 144
• ream 500
• mole
Counting units: • pair 2
• dozen 12
• gross 144
• ream 500
• mole602213670000000000000000
Counting units: • pair 2
• dozen 12
• 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
Molar Mass of Compounds
What is the mass of 1 mole of Al2O3?
Molar Mass of Compounds
What is the mass of 1 mole of Al2O3?
2 moles Al
3 moles O
Molar Mass of Compounds
What is the mass of 1 mole of Al2O3?
2 moles Al x 27.0 g/mole
3 moles O x 16.0 g/mole
Molar Mass of Compounds
What is the mass of 1 mole of Al2O3?
2 moles Al x 27.0 g/mole = 54.0 g
3 moles O x 16.0 g/mole = 48.0 g
Molar Mass of Compounds
What is the mass of 1 mole of Al2O3?
2 moles Al x 27.0 g/mole = 54.0 g
3 moles O x 16.0 g/mole = 48.0 g
-------
102.0 g
Molar Mass of Compounds
What is the mass of 1 mole of Al2O3?
2 moles Al x 27.0 g/mole = 54.0 g
3 moles O x 16.0 g/mole = 48.0 g
-------
102 g
Converting Moles to Mass
What is the mass of 1.25 moles Al2O3?
Converting Moles to Mass
What is the mass of 1.25 moles Al2O3?
2.50 moles Al
3.75 moles O
Converting Moles to Mass
What is the mass of 1.25 moles Al2O3?
2.50 moles Al x 27.0 g/mole
3.75 moles O x 16.0 g/mole
Converting Moles to Mass
What is the mass of 1.25 moles Al2O3?
2.50 moles Al x 27.0 g/mole = 67.5 g
3.75 moles O x 16.0 g/mole = 60.0 g
Converting Moles to Mass
What is the mass of 1.25 moles Al2O3?
2.50 moles Al x 27.0 g/mole = 67.5 g
3.75 moles O x 16.0 g/mole = 60.0 g
----------
127.5 g
Converting Moles to Mass
What is the mass of 1.25 moles Al2O3?
2.50 moles Al x 27.0 g/mole = 67.5 g
3.75 moles O x 16.0 g/mole = 60.0 g
----------
127 g
Tonight’s Homework:
Pp 311-312, problems 1-4