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can't see the board....
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kimmai

by kimmai at January 01, 2011

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LOL.  
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Stoichiometry Stoichiometry January 02, 2011

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i see the board perfectly fine try the brightness of your screen?if not just read the transcript
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jj.kim jj.kim January 02, 2011

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maybe its your computer..?
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gibby. gibby. January 02, 2011

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It is your computer maybe because I can see it perfectly fine.
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ChromeRedCat ChromeRedCat January 04, 2011

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Calculate the average atomic mass of an unknown element that has two naturally-occurring isotopes. The first isotope occurs 75.47% of the time and has a mass of 248.7 a.m.u. The second isotope occurs 24.53% of the time and has a mass of 249.4 a.m.u.
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dejuan002 dejuan002 February 15, 2011

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