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Home/ Chem 109H Fall08/ Contents contributed and discussions participated by Justin Shorb

Contents contributed and discussions participated by Justin Shorb

Justin Shorb

Thermo-chemistry - 0 views

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    Does anyone understand why melting ice is endothermic?
Justin Shorb

Macrogalleria: main directory - 0 views

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    From Prof. Moore's e-mail regarding Prof. Mahanthappa's suggested resource.
Justin Shorb

Chemistry 12 Worksheet 1-3 - Reaction Mechanisms - 0 views

  • the html version
    • Justin Shorb
       
      Click on the URL at right to access the pdf file!
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    Google HTML version of a pdf - click on the link on the top to download the pdf file.
Justin Shorb

Atom - Wikipedia, the free encyclopedia - 0 views

  • atom is the smallest unit
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    This applies to Prof. Moore's lecture on the atom
Justin Shorb

Exam I Useful review sites - 30 views

109h exam 1
  • Justin Shorb
     
    There have been a number of sites added and annotated to help you to look over your exams which are being returned this week. Please look through them. The EASIEST way to do so is to click on the "EXPAND" button by each bookmark to see what comments I have made on each of them specific to this class. As you add your own comments/questions, you will see those appear there, as well.

    Ask questions below, and remember to add any sites you stumble across!
  • Justin Shorb
     
    Below is a screenshot of what you see if you click on the EXPAND button. The comment on top is my own note for why the page is useful. The green box has what I highlighted, and the yellow overlay box has my comments about that selection on the page. These annotations are all available on the actual website if you log in to your Diigo account (and have joined our group).

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Justin Shorb

Calculating the Number of Photons? - Yahoo! Answers - 0 views

  • 1.0 mW at a wavelength of 670nm
    • Justin Shorb
       
      Exam I reads: 525 nm laser. What color of light is this laser pointer?
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    Basically answers Exam I #6 using different numbers.
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    Number of Photons emitted by a laser pointer.
Justin Shorb

What is the structure of C4H8? - Yahoo! Answers - 0 views

  • 1) 1-butene 2) 2-Butene 3) 2-Butene (cis and trans forms) 4)cyclobutane 5) methyl cyclopropane 6) 2-methyl propene
    • Justin Shorb
       
      Which of these are acceptable answers to Question 5?
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    Discussion about C4H8 isomers. Answers in IUPAC nomenclature.
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    Useful for noting isomers for Exam I #5. See if you can find structures from names.
Justin Shorb

cramster.com | problem solved | q&a board questions - 0 views

  • Response Details:
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    Pictures of isomers for Exam I #5
Justin Shorb

Construct a Lewis Structure - 0 views

  • Starting with a structure indicating only atom connections
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    Useful for extra help in Lewis Diagrams.
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    Doesn't have the same molecules as Exam I #7, but is useful practice!
Justin Shorb

Chemistry: The Molecular Science - Google Book Search - 0 views

  • Chemistry : the molecular science
  • 8.8 Formal Charge
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    Helps to answer Exam I #4
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    Page in Moore et al. text about Unit cells.
Justin Shorb

Window on the Solid State - Unit Cell - 0 views

  • Note that the edges of these cells all connect lattice points in the structure, points with the same environments.
    • Justin Shorb
       
      Be sure that when you draw a unit cell, if you place the 'left' edge against the 'right' edge, they have the same lattice points touching!
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    Helpful for Exam I #3
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    Useful for understanding how Unit Cells work
Justin Shorb

Trends of the Periodic Table - 0 views

  • Atomic Radius
    • Justin Shorb
       
      For a, b (see below for ion size)
  • Electronegativity
    • Justin Shorb
       
      for (c)
  • Ionic Radius vs. Atomic Radius
    • Justin Shorb
       
      For (b)
  • ...1 more annotation...
    • Justin Shorb
       
      Covalency has to do with how polar/non-polar the bond is. The more equal a partnership, the more covalent the bond is. Thus: compare electronegativities. Metal/non-metal pairs form ionic (extreme of polar covalent to the point of being NOT covalent) bonds.
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    Exam I, #1
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    Short exerpts on many basic Periodic Trends
Justin Shorb

Quantum Mechanics: 2-Dimensional Rectangular Box Applet - 0 views

  • java applet
    • Justin Shorb
       
      Try selecting various energy levels at the top of the applet. We have only talked about being in a single energy level at a time - thus deselect an energy level before selecting another one.
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    Only look at this one if you loved problem #9
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    Really in depth look at Energy Levels, Wavefunctions, and superposition of wavefunctions.
Justin Shorb

Periodic Trends - Effective Nuclear Charge - 0 views

  • Slater's Rules
    • Justin Shorb
       
      Note that this is how you would calculate ENC - Although the nucleus gets MORE positive down the PT, the ENC actually decreases! Not just the compensation part, but actually in it's entirety.
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    A good short synopsis of ENC
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    Good for #8 Exam I
Justin Shorb

Prentice Hall Assets - Effective Nuclear Charge Video - 0 views

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    Good for Question #10
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    Video showing basic ENC concepts.
Justin Shorb

Diigo Launches - More Than Just Bookmarking - 0 views

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    Good review for Diigo actually telling you how to use it! Great for people who want to do a project related to this!
Justin Shorb

NSDL.org | Light Color Energy Educational Resources Search Results > Page 1 | The Nati... - 0 views

  • LIGHT: ITS SECRETS REVEALED
    • Justin Shorb
       
      This is a fairly large PDF file, but it has some good visual information!
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    Great PDF talking about light. Good images of how to go from wavelength to sizes of various objects.
Justin Shorb

Olympus Microscopy Resource Center: Physics of Light and Color - Particle and Wave Diff... - 0 views

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    Good Java tutorial about particle versus Waves
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