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The Mole

The Mole. The Basic Chemical Unit. A Mole is :. A chemical quantity A Mole of any substance is Chemically equivalent to a mole of any other substance. A Mole is :. Anything that has the same number of particles as the number of atoms in exactly 12.0 grams of Carbon-12.

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The Mole

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  1. The Mole The Basic Chemical Unit

  2. A Mole is : • A chemicalquantity • A Mole of any substance is Chemically equivalent to a mole of any other substance

  3. A Mole is : Anything that has the same number of particles as the number of atoms in exactly 12.0 grams of Carbon-12.

  4. Avogadro’s Number 6.02 x 1023

  5. Representative Particles HOW TO COUNT

  6. Elements Atoms

  7. Covalent Compounds Molecules

  8. Ionic Compounds Formula Units

  9. One Mole of : • Carbon = 6.02 x 1023 Carbon Atoms • Silicon = 6.02 x 1023 Silicon atoms

  10. One Mole of : • CO2 = 6.02 x 1023 Carbon DiOxide Molecules • HNO3 = 6.02 x 1023 Nitric Acid Molecules

  11. One Mole of : • Platinum = _______ Platinum Atoms • Scandium = ______ Scandium atoms

  12. One Mole of : • CaCO3 = _______ Calcium Carbonate molecules • C12H22O11 = ______ Sugar molecules

  13. Molar Mass

  14. Defination The mass of one mole of a substance.

  15. One Mole of : • Carbon = 12.0 g • Silicon = 28.1 g • Barium = 137.3 g • Helium = 4.0 g

  16. One Mole of : Element = (molar mass) g Compound = (mol mass) g Substance = (mol mass) g

  17. One Mole of : • Aluminum = ____ g • Arsenic = ____ g • Silver = _____ g • Xenon = _____ g

  18. One Mole of : • CO2 = 44.0 g • SO3 = 80.1 g • BaSO4 = 233.4 g • (NH4)3PO4= 149.0 g

  19. One Mole of : • CaCl2 = ____ g • CoCO3 = ____ g • Pb(NO3)2 = _____ g • Al2(CO3)3 = _____ g

  20. One Mole of : • CaCl2 = 111.1 g • CoCO3 = 118.9 g • Pb(NO3)2 = 331.2 g • Al2(CO3)3 = 234.0 g

  21. Molar Volume

  22. MolarVolume The volume of one mole of gas @STP.

  23. STP Standard Temperature and Pressure

  24. 1 mole of gas @ STP 22.4 liters

  25. Does not matter what the gas is.

  26. Converting between Moles and Grams: • 1 mol = (molar mass) g • Conversion factors: • __ mol x • ___ g x

  27. Converting between Moles and Grams: • 2.8 mol Ag = ? g Ag • 2.8 mol x • 57.9 g Mg = ? mol Mg • 57.9 g x

  28. Converting between Moles and Atoms: • 2.8 mol Ag = ? atoms of Ag 2.8 mol x • 57.9 g Mg = ? atoms Mg 57.9 g x

  29. Convert 14.9 g H2O into moles 14.9 g x 1 mol 18.02 g H2O = 0.828 mol

  30. 3.4 mol x 18.02 g H2O 1 mol Convert 3.4 mol H2O into grams = 61.2 grams

  31. 25.1 g x 1 mol CO2 44.01 g CO2 = 0.570 mol Convert 25.1 g of CO2 into moles:

  32. Convert 35.8 g H2O into molecules: 35.8 g x 6.02x1023molecules 18.02 g H2O = 1.20x1024molecules

  33. Convert 0.191 moles of Cl2 into molecules: 6.02x1023molecules 0.191 mol x 1 mol = 1.15x1023molecules

  34. Convert 2.88x1024 molec-ules of Cl2 into moles: 2.88x1024 molecules x 1 mol 6.02x1023molecules = 4.78 moles

  35. What is the mass of 15 atoms of gold? 1 mole 15 atoms x 6.02x1023 atoms 196.97 g X 1 mole

  36. What is the mass of 15 atoms of gold? = 4.91 x 10-21 g

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