What is a Mole?

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What is a Mole?
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(No Transcript)
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The dozen is a counting unit!
What does dozen mean?
Yep, it means 12. But 12 what?
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There are other counting units

• 1 pair of objects 2 objects
• 1 gross of objects 144 objects
• 1 ream of paper 500 sheets
• 1 mole of particles ???? particles

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• 1 mole of apples
• 6.0 x 1023 apples
• 1 mole of diamonds
• 6.0 x 1023 diamonds
• 1 mole of carbon atoms
• 6.0 x 1023 carbon atoms

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The Mole

• Similar to a dozen, except instead of 12, its
  600 billion trillion 600,000,000,000,000,000,000,0
  00
• 1 mole particles 6.0 X 1023 particles
• This number is named in honor of Amedeo Avogadro,
  it is known as
• Avogadros Number.

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Molecular Mass
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1 atom of Cu has a mass of
63.5 u 1 mole of Cu atoms has a mass of
63.5 g
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• Look what makes the mole such a great
  unit
• 1 atom Carbon-----------------------------12 u
• 1 mole Carbon -----6.0 x 10 23 atoms-- 12g
• 1 atom Oxygen----------------------------- 16u
• 1 mole Oxygen -----6.0 x 10 23 atoms-- 16g
• 1 molecule of H2O -------------------------------
  -- 18u
• 1 mol of H2O -----6.0 x 10 23 molecules-----
  18g

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• Mole Particles
  Mass
• 1 mole X ______ 6.0 x 1023 X ________
  MM g X

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Practice

• 1) How many moles are present in 80 grams of
  CuCl2?
• 1mole-----134.6g
• x ----- 80 g
• 80 134.6 x
• x 80/134.6
• x 0.6 mole

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Practice

• 2) How many moles are present in 350 grams of
  CO2?

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• 2) How many grams are there in
• 3.4 x 1024 molecules of NH3?

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Given H2SO4

• a) How many moles are there in 1.4 x
  1025 molecules of H2SO4?
• b)How many grams are there in 3 molecules of
  H2SO4 ?
• c) How many moles are there in 75 grams of H2SO4
  ?