Chapter by Chapter review

Chapter by Chapter review - Final Exam Tues. Dec. 21;...

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Final Exam Tues. Dec. 21; 12:40-2:40 (beyond) Come early (12:20) This room: Funger 103 Office Hours: Wed. Dec. 15 11-5 Fri. Dec. 17, 1-3:30 Tues. Dec. 21, 11-12:20 Email ramaker@gwu.edu
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Chapter by Chapter review
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Summary Chapter 1 SI units: base (7) vs derived (gram vs. Newton) Precision (reproducibility) vs. accuracy(correctness) relative to average relative to true Precision indicated by number of significant figures Exact numbers do not enter in determining number of sig. Figs. Labeled Conversion factors make math easy Density vs. specific gravity (density rel. to water) Remember rules to count sig. Figs. Rules for sig. Fig. in mul/div and add/sub number of least smallest past decimal
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Significant Figures (2) 1. All nonzero digits are significant. 2. Zeroes between two significant figures are themselves significant. (101) 3. Zeroes at the beginning of a number are never significant. (0.001) 4. Zeroes at the end of a number are significant if a decimal point is written in the number. (100 vs. 100.0)
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Significant Figures (3) When addition or subtraction is performed, answers are rounded to the least significant decimal place . 100.5 + 100.60 When multiplication or division is performed, answers are rounded to the number of digits that corresponds to the least number of significant figures in any of the numbers used in the calculation.
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Accuracy versus Precision Accuracy refers to the proximity of a measurement to the true value of a quantity. Precision refers to the proximity of several measurements to each other.
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Summary- Chap. 2 Molecular compounds : electrons shared. Nonmetals Those with C called organic Ionic compounds : electrons transferred from cation to anion metal to nonmetal •Naming: Molecular : (Num) English – (Num)English-ide PCl 5 If hydrogen: hydrogen-(English-ide) H 2 S Naming Ionic : Metal(English)(Stock*) – Anion(English-ide) *Stock number is to specify charge if forms more than one. NaCl, Fe(III)oxide
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Patterns in Oxyanion Nomenclature (More than 2) 1. The one with the most oxygens has the prefix per - and ends in - ate ClO 4 : perchlorate 1. The one with the second most oxygens ends in - ate ClO 3 : chlorate 1. The one with the second fewest oxygens ends in - ite ClO 2 : chlorite 1. The one with the fewest oxygens has the prefix hypo - and ends in - ite ClO : hypochlorite ate ite
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Acid Nomenclature If the anion in the acid ends in - ite , change the ending to - ous acid : HClO: hypochlorous acid – HClO 2 : chlorous acid
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Summary- Chap. 3 1)1 mole = atomic, molecular, or formula weight in grams=
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Chapter by Chapter review - Final Exam Tues. Dec. 21;...

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