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02:33 2012 National You Be The Chemist Challenge 2012 National You Be The Chemist Challenge	2012 National You Be The Chemist Challenge you be the chemist you be the chemist challenge ybtc cef chemical educational foundation academic co contests science & math From ceflb10 0 likes 2 plays
06:20 Introduction to You Be The Chemist Introduction to You Be The Chemist	Introduction to You Be The Chemist cef ybtc chemicals education challenge you be the chemist chemical educational foundation stem experiments middle school science From ceflb10 0 likes 3 plays