chem notes 9-12 - September 12, 2007 Dr. Stevens Gen. Chem....

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September 12, 2007 Dr. Stevens Gen. Chem. 1 Homework Help -Sunday through Thursday (7-9pm) 237 -Question 6: 2 sig figs (only pennies, no fractions) – 5 extra tries -Email etiquette -Whitworth acct. -Use the subject line to tell the information Factor-Label Questionnaire Volumes – liters (L/mL/etc.) - cubic measurement (xyz) -ft^3, cm^3, etc. Conversion – 1mL = 1cm3 Example Density of N2 gas = 2.0 g/L. What is the mass in 1.0 in^3? d=m/v -> m=dv; m=2.0g/Lx1.0in^3 1in=2.54cm, 1in^3=(2.54cm)^3 2.0x1.0x(2.54)^3x(1/1000) = 3.3e-2 Chapter 2 Objectives -Know structure of the atom -Write isotopes in proper notation -Understand layout of the Periodic Table -Know and use ionic notation for # e/p/n. -Write empirical and molecular formulas -Name ionic and molecular compounds Atomic Theory Dalton (c. 1808) -elements are composed of atoms -atoms of an element are identical -compounds are composed of ratios of atoms of 2+ elements in fixed proportions -fixed proportions = integer of simple fraction (ex: 2/5, 3/1, etc.)
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This note was uploaded on 04/23/2008 for the course CH 151 taught by Professor Stevens during the Fall '08 term at Whitworth University.

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chem notes 9-12 - September 12, 2007 Dr. Stevens Gen. Chem....

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