Lecturez17WebSH

# Lecturez17WebSH - Wed Oct 19 2011 Todays Lecture Work...

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Wed. Oct. 19, 2011 Today s Lecture Work through sample questions on Atomic Theory. Review of Material Midterm- Mon., Oct 24. 6:30-8:30pm. You will be notified by e-mail of the room

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The only calculator allowed in examinations (midterm and final) AUREX SC 6145 Available in the bookstore ~ \$10

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Grading Problem Sets 10% + Midterm 25% + Final Exam 45% + Laboratory 20% CHEM 121

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• Atoms, Molecules, Ions • Stoichiometry • Chemical Reactions • Gases • Thermochemistry • Atomic Theory • Periodic Properties • Chemical Bonding • Liquids/Solids • Solutions General Chemistry I Midterm: Monday October 24 starting at 6:30 pm
–Notation for atoms: •X = element symbol •A = atomic mass number = # of protons + # of neutrons •Z = atomic number = # of protons = # of electrons in a neutral atom X A Z Know which experiments were used to determine the nature of the atom

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Mass Spectra 69 70 71 72 73 74 75 0.0 0.1 0.2 0.3 0.4 0.5 0.6 Relative Intensity Mass Number Know the difference between amu of an isotope and the average atomic mass of an element Be able to calculate average atomic masses of element from the percent abundance of the isotopes, and vice versa Be able to name Simple Compounds
Be familiar with the following calculations: Empirical and molecular formulae from mass % or mole % of elements in a compound. Stoichiometric Calculations: Amounts of Reactants and Products. Acid-base titrations Calculations involving a limiting reagent :

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• chemical reactions: – most common reactions may be classified into 3 classes: • .. • .. • .. • Know the 3 ways to describe reactions in solution precipitation reactions acid-base reactions oxidation-reduction reactions Know Solubility rules Perform Stoichiometric Calculations Calculate Oxidation Numbers; Balance Redox Reactions using the half-reaction method in acidic and alkaline media
• Ideal gas: – Know the difference between : • Boyle’s law: • Charle’s law: • Avogadro’s law: P k V = bT V = an

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Lecturez17WebSH - Wed Oct 19 2011 Todays Lecture Work...

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