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Chapter 11: The Mole

11.1 Measuring Matter
counting particles, Avogadro’s Number 6.02 x 1023, mole,
mole ↔ particle equations
# moles x 6.022 x 1023 particles/mole = # of particles
# particles x 1 mole / 6.022 x 1023 particles = # of moles

11.2 Mass and the Mole
mass of a mole, molar mass,

mass ↔ mole equations
# of moles x # of grams / mole = # of grams
mass (in grams) / molar mass (grams / mole) = # of moles

11.3 Moles of Compounds
chem formulas & mole, molar mass of compounds,
mole ↔ mass of compound
mass ↔ particles (molecules) of compound

11.4 Empirical and Molecular Formulas
Percent composition of compound, empirical formula, determining molecular formula
% by Mass = Mass of Element / Mass of Compound x 100

11.5 Formula of a Hydrate
Naming hydrates Na2CO3 · 10 H2O is a decahydrate (10 waters per molecule) Empirical formula, molecular formula Molecular formula = (empirical formula subscripts) n

  Homework
Section 11.1 Measuring Matter
  1. 3/4/2019 p312 4 a,b,c,d - must use format shown in class
  2. 3/4/2019 VIDEO LINK - Tyler DeWitt on x & ÷ significant figures
  3. 4/2/2019 p347 - 348 99 (b), 101 (b), 108 (b) , 114(b),
    122 (b) lead(II) chloride is PbCl2
    and a formula unit is the same as a molecule
Section 11.2 Mass and the Mole
  1. 3/5/2019 p 316 12 a,b,c,d - format as shown in class
  2. 3/5/2019 VIDEO LINK - x and divide with powers of 10 and significant figures (shown in class today)
  3. 3/6/2019 p318 13 a,b,c,d,e
  4. 3/11/2019 p. 318 14 a,b,c,d,e (8 pts)
  5. 4/2/2019 p347 - 348 99 (b), 101 (b), 108 (b) , 114(b),
    122 (b) lead(II) chloride is PbCl2
    and a formula unit is the same as a molecule
  6. 4/11/2019 HW - Stoichiometry Worksheet - work all problems, show calculations including the molar masses that are used. Answers in the the whiteboard file at the end of the file on slide 31.
Section 11.3 Moles of a Compound
  1. 3/13/2019 p346 89a, 92a, 98a, 101a, 107
  2. 4/2/2019 p347 - 348 99 (b), 101 (b), 108 (b) , 114(b),
    122 (b) lead(II) chloride is PbCl2
    and a formula unit is the same as a molecule
  3. 4/11/2019 HW - Stoichiometry Worksheet - work all problems, show calculations including the molar masses that are used. Answers in the the whiteboard file at the end of the file on slide 31.
Section 11.4 Empirical and Molecular Formulas
Section 11.5 The Formula for a Hydrate
  1. 3/27/2019 p. 340 63 modified - calculate molar mass of MgSO4 and H2O and convert grams we calc. in class to moles MgSO4 and H2O

    Periods 2-5 - Check out the whiteboard file for significantly more help on the problem you are supposed to do tonight. LOTS AND LOTS OF HELP. See pages 14, 15, and 18.
  2. 3/28/2019 p 349 #152 (use formatting shown in class today)

    Answer: the anhydrate (MgI2) will have 2 H2O molecules
  3. 3/29/2019 Formula of a Hydrate LAB - complete your calculations to get the mole ratio of the anhydrate (MgSO4) : to water (H2O)
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