1. A Mole is an Unit

3. Representative Particles
Type of Substance
Description
R.P. ( UNIT)
Element
1 symbol
ATOM
Covalent Molecule
2 or more NM
MOLECULE
Ionic Compound
Cation-Anion
M -NM
FORMULA UNIT

4. Caribbean Monkeys Eat Avocados In Forest
Caribbean = Covalent Monkeys = Molecules

5. Caribbean Monkeys Eat Avocados In Forest
Eat = Element Avocados = Atoms

6. Caribbean Monkeys Eat Avocados In Forest
In = Ionic Forest = Formula Unit

7. or 1 mole = 6.02 x 1023 molecule 1 mole = 6.02 x 1023 formula unit
1 mole = 6.02 x 1023 atom or
1 mole = 6.02 x 1023 molecule
1 mole = 6.02 x 1023 formula unit

8. Determine the type of Representative Particle
1. Mg
2. C3H8
3.NaCl
4. CBr4
5. Li
6. K2O
7. Cl2
8. H2O

10. Using Representative Particles
Example Problems
Using Representative Particles

11. How many moles of magnesium is 1.25 x 1023 atoms?
Given Info:
Conversions:
Work:
Looking for?
Answer:

12. How many molecules are in 2.12 mole of propane-C3H8 ?
Given Info:
Conversions:
Work:
Looking for?
Answer:

13. How many molecules are in 2.12 mole of propane-C3H8 ?
Given Info:
2.12 mole C3H8
Conversions:
1 mole = 6.02x1023
molecule
Work:
2.12 mole x 1023 molecule
C3H C3H8
1 mole C3H8
Looking for? molecules C3H8
Answer: x 1024 molecule C3H8

14. Example Problems
Using Molar Mass

16. How many grams are in 2 moles of calcium hydroxide?
Given Info:
Conversions:
Work:
Looking for?
Answer:

17. How many molecules are in 4.42 x 106g of water molecules?
Given Info:
Conversions:
Work:
Looking for?
Answer

19. How many molecules are in 4.42 x 106g of water molecules?
Given Info:
4.42 x 106g
Conversions:
MM = 18.02g H2O
1 mole
1mole = 6.02x1023
molecule
Work:
4.42x106g 1 mole x1023 molecules
H2O H2O H2O
18.02 g mole H2O
H2O
Looking for?
molecules
Answer: x 1029 molecules

20. Example Problems
Using Molar Volume

21. Molar Volume @ STP only Standard Temperature and Pressure: STP
Standard Temperature: 273K
Standard Pressure: 1 atmosphere (atm)
At these 2 conditions: Molar Volume
1 mole = 22.4L

23. How many liters are 2.78 x 1031 molecules?
Given Info:
Conversions:
Work:
Looking for?
Answer:
How many liters are 2.78 x 1031 molecules?

24. How many liters are 2.78 x 1031 molecules?
Given Info:
2.78 x 1031 molecules
Conversions:
1 mole =6.02x1023 molecules
Work:
2.78 x1031 molecules 1 mole L
6.02 x mole
molecules
Looking for?
liters
Answer: 1.03 x 109 L
How many liters are 2.78 x 1031 molecules?

25. The density of a gaseous compound containing carbon and oxygen is 1
The density of a gaseous compound containing carbon and oxygen is STP. Determine the molar mass of the compound.
Given Info:
Conversions:
Work:
Looking for?
Answer: