Chapter 6 Part 1

Chapter 6 Part 1 - Exam #2 Range 16 59 out of 60 Mean score...

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Exam #2 Range 16 – 59 out of 60 Mean score 46.4/60 = 77.3% Curve = 6% > 60 % in A/B range May apply another curve at the end of the semester Example: someone with 48/60 (80%) gets an adjusted score of 86% (high B) Web postings exam keys, curves file, results histograms, your grades up to now Homework chapter 6 See WebCT, Due Tuesday November 13 • Before starting Chapter 6, let’s look at videos relevant to Chapter 5. After all, Chapter 5 material will covered on the final exam
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Chapter 6 Chemistry for Changing Times Chemical Accounting
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Chemical Sentences: Equations Chemical equations represent the sentences in the language of chemistry . They are the means of communicating a chemical change using the symbols and formulas to represent the elements and compounds involved in a chemical reaction.
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Chemical Sentences: Equations Reactants are the species present before the reaction. Products are the species present after the reaction. Reactants Products The arrow ( ) means “yield(s)” or “react(s) to produce.” See example on next slide
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Chemical Sentences: Equations The following are used to denote the states of matter of a species in an equation: (s) = solid (l) = liquid (g) = gas (aq) = aqueous solution C(s) + O 2 (g) CO 2 (g) {@ coal burning power plants}
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Equations Coefficients are numbers used to balance a chemical equation. Never change the subscripts. • Hydrogen fuel
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Chapter 6 Part 1 - Exam #2 Range 16 59 out of 60 Mean score...

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