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Happy Birthday Dan Aykroyd ( 1952)

Happy Birthday Dan Aykroyd ( 1952). Reading: Chapter 8 Section 6-9 (quiz) HW 7: DUE Wednesday 7/2/14 ( only assignment from this chapter) Chap. 7, #'s 11, 12, 15-21 odd, 31, 33, 35, 39, 40, 53, 59, 67, 70, 72-75 all, 77, 82, 84, 88, 89

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Happy Birthday Dan Aykroyd ( 1952)

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  1. Happy Birthday Dan Aykroyd(1952) • Reading: Chapter 8 Section 6-9 (quiz) • HW7: DUE Wednesday 7/2/14 (only assignment from this chapter) • Chap. 7, #'s 11, 12, 15-21 odd, 31, 33, 35, 39, 40, 53, 59, 67, 70, 72-75 all, 77, 82, 84, 88, 89 • HW 8: DUE Thursday 7/3/14 (only assignment from this chapter) • Chap. 8, #'s 5, 11, 19-27 odd, 33, 35, 37, 39,55-61 odd, 77, 79, 81, 85, 92, 117, 121, 122, 123 • Lab Tomorrow (WET LAB!) • Experiment 6 • Exam 2 on Thursday • Monday - Nomenclature Proficiency Quiz 1 • Wednesday – DA/Math Proficiency Quiz 2

  2. dozen 12 things gross 144 things ream 500 things mole 602200000000000000000000 things 6.022x1023 things JUST A NUMBER!!! Words that Represent Numbers

  3. One mole of ANYTHING has 6.022x1023 things in it!! Let’s assume that there is an omnipotent being with a pile in front of him which contains 1 mole of carbon atoms, and let’s say he has a pair of tweezers capable of picking up a single atom at a time (omnipotence has its benefits). Scientist say that the universe is about 15 billion years old (1.5x1010 years old). That is a LONG time, but there are 6.022x1023 atoms of carbon sitting in front of this guy, so let’s use the shortest time frame possible that we can comprehend, the second. In the 15 billion years since the Big Bang, there have been 4.7x1017 seconds. Now, let’s say that our being has been picking up one carbon atom with his tweezers EVERY SECOND of the 15 billion years since the big bang. By today, he is barely 1 MILLIONTH of the way through his pile of carbon… that is how big one mole is. One dozen of ANYTHING has 12 things in it!! Or, try this one on… one mole of chocolate chips would burry the entire surface of the Earth by 590 METERS (close to 2000 feet)!!!! This number, 6.022x1023 is called Avogadro’s number.

  4. Using Avogadro’s number 6.022x1023 [things] = 1 mole [things] 6.022x1023 atoms K = 1 mole K

  5. Using Avogadro’s number How many moles contain 8.33x1022 atoms of Cl? 1 mol Cl = 6.022x1023 atom Cl

  6. Using Avogadro’s number How many molecules are there in 13.251 mol of carbon tetrachloride? 1 mol CCl4 = 6.022x1023 molecules CCl4

  7. Molar Mass Using the following information, calculate the mass (in grams) of ONE mole of calcium = 40.08 amu (if one atom) = 40.08 g/mol (if one mole of atom)

  8. Molar Mass molar has nothing to do with teeth!!!!!!! molar means “per 1 mole” molar mass means mass per 1 mole

  9. Molar Mass = 40.08 amu (if one atom) = 40.08 g/mol (if one mole of atom) unit equation  1 mol Ca = 40.08 g Ca

  10. Molar Mass What is the MOLAR MASS of calcium oxide? CaO = Ca2+ + O2- = 40.08 g/mol + 16.00 g/mol 56.08 g/mol = molar mass CaO 1 mol CaO= 56.08 g CaO 1 mol CaO= 56.08 g CaO = 6.022x1023 molecules CaO = 40.08 g/mol = 16.00 g/mol

  11. Molar Mass Mg MgCl2 Cl 2 x = 24.31 g/mol = 2 x (35.45 g/mol) = 70.90 g/mol = 35.45 g/mol 24.31 g/mol + 70.90 g/mol 95.21 g/mol = molar mass MgCl2

  12. Molar Mass MgCl2 1 mol MgCl2= 95.21 g MgCl2

  13. Molar Mass 87.62 g/mol +32.00 g/mol Sr Sr(OH)2 O H + 2.02 g/mol 2 2 x x 121.64 g/mol = 87.62 g/mol = 16.00 g/mol = 2 x (16.00 g/mol) = 32.00 g/mol = 1.01 g/mol = 2 x (1.01 g/mol) = 2.02 g/mol

  14. Molar Mass Sr(OH)2 1 mol Sr(OH)2= 121.64 g Sr(OH)2

  15. Molar Mass Fe(C2H3O2)3 Fe C H O 2 x 3 x 2 x 3 3 3 x x x = 55.85 g/mol 55.85 g/mol = 12.01 g/mol = 6 x (12.01 g/mol) = 72.06 g/mol 72.06 g/mol = 1.01 g/mol = 9 x (1.01 g/mol) = 9.09 g/mol 9.09 g/mol = 16.00 g/mol = 6 x (16.00 g/mol) = 96.00 g/mol 96.00 g/mol molar mass Fe(C2H3O2)3 = 233 g/mol 233.00 g/mol

  16. Did you get it? How many moles of chromic acid are in 7.65x1024 molecules of chromic acid? H2CrO4(aq) How many atoms of silver are in 2.3400 moles of silver? What is the molar mass of manganese (IV) phosphite? Mn3(PO3)4

  17. Did you get it? How many moles of chromic acid are in 7.65x1024 molecules of chromic acid? 1 mol H2CrO4(aq) = 6.022x1023 molecules H2CrO4(aq)

  18. Did you get it? How many atoms of silver are in 2.3400 moles of silver? 1 mol Ag = 6.022x1023 atoms Ag

  19. Did you get it? What is the molar mass of manganese (IV) phosphite? Mn3(PO3)4

  20. Did you get it?

  21. Avogadro’s # The mole Only 2 options of what to do with the mole: mole particles molar mass mole grams

  22. Avogadro’s # The mole Only 2 options of what to do with the mole: mole particles

  23. molar mass mole mass The mole Only 2 options of what to do with the mole:

  24. Percent Composition How much of each element makes up a compound

  25. Percent Composition What is the percent composition of barium selenate? BaSeO4 = 280.29 g/mol BaSeO4

  26. What is the percent composition of each element in strontium phosphite?

  27. Sr3(PO3)2 What is the percent composition of each element in strontium phosphite?

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