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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
 3/4/2019 p312 4 a,b,c,d - must use format shown in class 3/4/2019 VIDEO LINK - Tyler DeWitt on x & ÷ significant figures 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
 3/5/2019 p 316 12 a,b,c,d - format as shown in class 3/5/2019 VIDEO LINK - x and divide with powers of 10 and significant figures (shown in class today) 3/6/2019 p318 13 a,b,c,d,e 3/11/2019 p. 318 14 a,b,c,d,e (8 pts) 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 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
 3/13/2019 p346 89a, 92a, 98a, 101a, 107 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 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 11.5 The Formula for a Hydrate
 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. 3/28/2019 p 349 #152 (use formatting shown in class today) Answer: the anhydrate (MgI2) will have 2 H2O molecules 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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