Chemistry Unit 3 Revision before the exam!

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i seriously m gettin mixd up for chem tomrow!!!!!! i studyd but then i get confused for example i dont have the notes on potassium iodide reactions with chlorine solutions.... aaaghhh and organic chem is worse... .i dont get a thing.... especially the skeletal formulas.... :( can someone please help mee???? :(
 
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these notes are really good
 

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