GCSE Chemistry - Carboxylic Acids #58
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2:02
GCSE Chemistry - Esters #59
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4:08
GCSE Chemistry - Alcohols #57
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5:19
GCSE Chemistry - Condensation Polymers (Polyesters) #60
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3:41
GCSE Chemistry Revision "Carboxylic Acids" (Triple)
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7:11
GCSE Chemistry - Addition Polymers & Polymerisation #56
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5:37
What staying up all night does to your brain - Anna Rothschild
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17:14
the 5 hardest exams in the world
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13:22