The Mole Mol

1
The Mole (Mol)

• Chapter 8
• Gina Gonnella

2
The Mole

• 6.02 x 1023 particles 1 mole
• Formula Weight grams/mole (Table)
• The volume of 1mole 22.4 Liters

3
Avogadro Constant

• 6.02 x 1023
• Accepted SI standard
• Represents 1 mole (mol)
• Used when converting moles to formula units and
  formula units to moles

4
The Mole Map

• The Mole Map is a very useful tool MEMORIZE IT!
• When given the outside units divide in
• When given mole multiply out
• Remember to always cancel units and check your
  work

5
Grams ? Moles Example

• 11.5 g of ethanol, C2H5OH
• Use Periodic Table
• C12.01(2) H1(6) O16 Total 46.1
• 1 mol 46.1 g or 1mol/46.1g 1
• Answer 0.249 mol C2H5OH

6
Molecules ? Moles and Grams

• How many moles is 1.20 x 1025 molecules of
  ammonia, NH3?
• What mass is the number of molecules?
• 1 mol/ 6.02 x 1023 molecules
• NH3 14 1(3) 17 g NH3

7
Grams ? Atoms

• 10.0 g sample of calcium metal
• 1. Find of moles in 10.0 g Ca
• 2. Convert to Atoms
• Ca 40.1 g 1 mol 6.02 x 1023

8
Convert 0.638 mol Ba(CN)2 to grams

• A. 1 g Ba(CN)2
• B. 100 mol Ba(CN)2
• C. 121 g Ba(CN)2
• D. 638 g Ba(CN)2

9
C. 121 g Ba(CN)2
10
Convert 0.943 mol H2O to molecules

• A. 5.68 x 1023 molecules H20
• B. 9.43 molecules H20
• C. 0.943 x 1024 mol H20
• D. 1 molecule H20

11
5.68 x 1023 molecules H20
12
To Practice

• Chapter 8
• Practice Problems pg. 202 and 203
• Honors Chem Notes pg. 2
• Regent Review pg. 5
• REMEMBER TO CANCEL UNITS!!
• ALWAYS CHECK WORK!!