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Cocoa powder is hydrophobic—no wonder it takes forever to stir up a mug of Ovaltine!
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Do you need to wear gloves when handling liquid nitrogen? A chemistry teacher reveals the truth with
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Homemade pesticide-free little "Venom"? A chemistry teacher's hardcore tutorial—Marvel fans must che
Can this chemical pigment glow? The chemistry teacher didn't turn on the lights for the experiment t
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