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What is a mole?

What is a mole?. A mole is a quantity equal to the number of atoms in exactly 12g of carbon-12. Remember that the relative atomic mass is always based on the comparison of any atom to the carbon atom. . I say dozen, you say…. What is its symbol? . Symbol: mol 12g of C-12 = 1 mol of C-12

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What is a mole?

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  1. What is a mole? • A mole is a quantity equal to the number of atoms in exactly 12g of carbon-12. • Remember that the relative atomic mass is always based on the comparison of any atom to the carbon atom.

  2. I say dozen, you say…

  3. What is its symbol? • Symbol: mol • 12g of C-12 = 1 mol of C-12 • The Atomic mass of C-12 = 12 amu = 12g/mol This is called the MOLAR MASS

  4. The molar mass of a substance is…? …the mass of one mole of that substance.

  5. 1 mole of CO2 has a mass of 44 amu…

  6. What is really in 1 mol?

  7. Avogadro’s number represents… … The number of entities in 1 mol. • There are always 6. 02 X 1023 atoms or molecules in 1 mol.

  8. 1. Change 4.0 X 103 Na atoms to mass of sodium atoms.

  9. 2. Change 55g of Ca(OH)2 to molecules of Ca(OH)2.

  10. Complete Part B on your own

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