Click on the link for the virtual mass spectrometer demonstration if you would like to see how a "mass spec" operates.
A link to the Average Atomic Mass / Percent Abundance worksheet is on the AP Chemistry calendar for August 19th if you need another copy. We will finish the percent abundance practice problem first thing in class tomorrow. I will be requiring that you put your answers to questions #16 and #17 on the WebAssign chapter 2 assignment. Please wait to do so until I have configured the site to take the answers and grade them. Also, because I have added more problems to the chapter 2 assignment, I have extended the due date to Tuesday, August 24rth, 2010.
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