Mole-o-rama
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Transcript of Mole-o-rama
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Mole-o-ramaChapter 3.4
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Objectives
• Why did you have to have 602 beans in your mole?
• Weighing to count• What is a mole?
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Count
• Option 1: Count 602 beans• Option 2: Say you counted• Option 3: Mass a bean
» Multiply by 602» Collect that mass of beans!
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Even better…
• Beans are different…• Use average value• Mass 10 beans …
• Divide by 10 = average
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More beans…
6.0 g8.0 g5.0 g4.0 g5.0 g
ABCDE
Average bean here is 5.6 g
602 bean B = 4800 grams
602 bean D = 2400 grams
602 average = 3400 grams
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Use averages!!
Periodic Table Isotope Isotope
Average Atomic Mass:
•Average mass of all atoms of an element
•Found on periodic tables everywhere
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http://www.chem.wisc.edu/areas/reich/handouts/periodic-table.GIF
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http://img.photobucket.com/albums/v623/johnnysilver/etc/chineseperiodictable.gif
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What is the average?
35 Cl
36
37 Cl
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What is the average?
35 Cl
35.6
37 Cl35 Cl
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What is the average?
35 Cl
35.5
37 Cl35 Cl 35 Cl
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Use averages!!
Periodic Table Isotope Isotope
35.45 is the average atomic mass of Cl
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Back to the beans…
• If we had a dozen beans… what would they weigh?
12 beans 5.6 g
1 bean = 67 grams
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Back to the beans…
• If we had a dozen bean burritos*… what would they weigh?
12 burritos 440 g
1 burrito = 5280 grams
http://www.bajafresh.com/burritos.php
*Bean burrito is not pictured due to boring-ness … this is the Baja Fresh Baja Burrito…
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Molé
Tasty sauce for burritos, etc.
http://www.lasanitas.com/ourmenu/images/apic7big.jpg
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Mole
http://www.cohenufo.org/Images.GIF/Mole.jpg
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Mole
• Aside from being a small rodent and fun project…
http://snigglezone.com/images/mole1.jpg http://mrskingsbioweb.com/moleday.JPG
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Avogadro’s Number … the Mole!
• The Mole is a counting number• Chemist’s Dozen
6.02 x 10 23 things
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If we had a mole of beans…
• It would have the mass of 3 billion billion CVN 76’s
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By the way
• Enough aircraft carriers (which are about 3 ½ football fields long) to reach the sun and back almost 4 BILLION times
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Why do we need the mole?
• This paperclip is 1.18 g
• 23 of them have 1 mole of Al atoms
6.02 x 10 23 atoms
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Next time…
The name is Mole.James Mole.
http://k9zw.files.wordpress.com/2007/10/moles_are_forever.jpg