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The Mole – It’s Important

The Mole – It’s Important. Mr. Chapman Chemistry 20. Buying Eggs. When you buy eggs, you usually ask for a dozen eggs. (12) You know that one dozen of ANY item is 12. Paper Packages. Paper is packaged by a ream. One ream of paper is equal to 500 sheets .

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The Mole – It’s Important

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  1. The Mole – It’s Important Mr. Chapman Chemistry 20

  2. Buying Eggs • When you buy eggs, you usually ask for a dozen eggs. (12) • You know that one dozen of ANY item is 12.

  3. Paper Packages • Paper is packaged by a ream. One ream of paper is equal to 500sheets. • You know that if you have 2 reams of paper, you have 1000 sheets.

  4. Group Brainstorm • If you were asked to create a new unit to count something, what would you consider when choosing how many items should be included in your new counting unit? • What kinds of things would you pay attention to when you were going to make this unit?

  5. The Problem • Chemists and scientists had this exact problem when they were trying to decide how to count atoms. • Recall that atoms are the basic building blocks of matter, and that they are incredibly small. More atoms than you can count in a million years are present in a grain of sand.

  6. A Solution! • In 1815, a man named Amadeo Avogadro came up with a solution. • He realized that he needed a unit that would make it convenient to weight out certain amounts of different elements. • After a lot of complicated work we don’t need to understand he came up with this...

  7. The Mole! The mole is the unit that we use to count atoms!!!!

  8. What is the Mole? • Remember that this concept is NO DIFFERENT from the fact that a dozen of something is 12 of that thing; • A mole of something is 6.022 x 1023, a.k.a. 602 200 000 000 000 000 000 000 of something.

  9. Avagadro’s Number • This massive number (6.022 x 1023) is also known as Avagadro’s Number, since he is the one who defined it. • Technically, a mole is the number of atoms in 12 grams of Carbon-12. All we need to know is that the mole is super convenient.

  10. Some Examples: • You have 3 moles of soccer balls. How many soccer balls do you have? • I have 5.46 x1028 ballerina shoes, how many moles of them do I have? Do you have any questions about the mole?

  11. Are YOU The Mole??? Did anyone ever watch that show?

  12. The Periodic Table Gets It... This is the mass of ONE MOLE of carbon atoms. It is also known as the MOLAR MASS of carbon.

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