Lecture 2 (10am) Chapter 3 September 4 2009

Lecture 2 (10am) Chapter 3 September 4 2009 - Exam Room...

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Exam Room Assignments (These are also posted on our LMS site) 1110-01 DCC 318 1110-04 DCC 330 1100-09 Sage 3303 1100-11 DCC 308 Extra Time Students Walker 3221 Reminder: “High School Knowledge Exam” is on Wednesday (September 9 th ) at 8am. Make sure that you bring a #2 pencil and a scientific calculator (NO Graphing Calculators Allowed)
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New SI (Supplemental Instruction) Session Information: Tuesday September 8 th : Review for HSK Exam, 8-10pm in DCC 337 Starting on September 15 th : SI sessions will be Tuesdays and Thursdays, 6:30 – 8:30pm in DCC 239 (Note that the information I posted in my first lecture has changed)
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Chapter 3 Lecture 2, September 4 2009
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Empirical and Molecular Formulas How to find an unknown compounds chemical formula or confirm the formula of something we think we know … find substances empirical formula
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Two main ways to determine empirical formula: 1. Elemental Analysis – gives us information about the mass percent of elements in a compound.
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Example: Analysis of Zircon, a diamond-like mineral, shows that it contains 34.91% O, 15.32% Si, 49.76% Zr. The molar mass of zircon is known to be less than 200 g/mol. Determine the molecular formula of Zircon.
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