2.04
The Mole and
Conversion
Objectives & Standards
• Objectives:
• After completing this lesson, you will be able to:
• Describe the mole and its use as a unit of measure in
chemistry.
• Use Avogadro’s number and atomic mass values to
complete mathematical conversions.
• Standards:
• SC.912.P.8.8—Apply the mole concept and the law of
conservation of mass to calculate quantities of chemicals
participating in reactions.
What is a mole?
• What is a dozen?
• Dozen = 12; It is a word used to represent
an amount.
• Other examples, 6 cookies per package.
• If there are 36 cookies per batch how many
batches of cookies must we make to have
48 cookies?
• 1 batch = 36 cookies
48 Cookies x
1 batch
36 cookies
= 1.33 batch
The Mole
Molar Mass
Key Terms
Mole
Avogadro’s Number
Molar Mass
Definition
Conversion
Molar Mass
Example:
What is the mass of 2.35 mol of sulfur?
Given:
Conversion Factor(s):
Want:
Molar mass Practice
How many moles of potassium are in 27.8
grams of potassium (K)?
Given:
Conversion Factor(s)
Want:
Avogadro’s Number
Key Terms
Mole
Avogadro’s Number
Molar Mass
Definition
Conversion
Avogadro’s Number Practice
How many moles of aluminum (Al) are
equivalent to 3.7 × 1023 atoms?
Given:
Conversion Factor (s):
Want:
Avogadro’s Number Practice
How many moles of aluminum (Al) are
equivalent to 3.7 × 1023 atoms?
Given:
Conversion Factor(s):
Want:
Mole Flow Chart: 1 or 2 Step Problems
What is the mass, in
grams, of a sample of
1.20 × 1022 atoms
of mercury (Hg)?
Given:
Want:
Conversion Factor(s):
How many moles of bromine (Br) atoms are
in a sample of 2.03 × 1024 atoms?
Given:
Want:
Conversion Facors:
How many moles of cesium (Cs) atoms are in
675 g Cs?
Given:
Want:
Conversion Factor(s):
What is the mass of 1.7 × 1023 atoms of zinc
(Zn)?
Given:
Want:
Conversion Factor(s):