2.04 the mole and conversion. objectives & standards objectives: after completing this lesson,...
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2.04
The Mole and Conversion
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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.
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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 cookies48 Cookies x 1 batch = 1.33 batch
36 cookies
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The Mole
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Molar Mass Key Terms Definition Conversion
Mole
Avogadro’s Number
Molar Mass
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Molar Mass
Example:
What is the mass of 2.35 mol of sulfur? Given: Conversion Factor(s):Want:
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Molar mass Practice
How many moles of potassium are in 27.8 grams of potassium (K)?Given: Conversion Factor(s)Want:
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Avogadro’s NumberKey Terms Definition Conversion
Mole
Avogadro’s Number
Molar Mass
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Avogadro’s Number Practice
How many moles of aluminum (Al) are equivalent to 3.7 × 1023 atoms?Given: Conversion Factor (s):Want:
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Avogadro’s Number Practice
How many moles of aluminum (Al) are equivalent to 3.7 × 1023 atoms?Given: Conversion Factor(s):Want:
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Mole Flow Chart: 1 or 2 Step ProblemsWhat is the mass, in grams, of a sample of 1.20 × 1022 atoms of mercury (Hg)?
Given:Want:
Conversion Factor(s):
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How many moles of bromine (Br) atoms are in a sample of 2.03 × 1024 atoms?
Given:Want:
Conversion Facors:
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How many moles of cesium (Cs) atoms are in 675 g Cs?
Given:Want:
Conversion Factor(s):
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What is the mass of 1.7 × 1023 atoms of zinc (Zn)?
Given: Want:
Conversion Factor(s):