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Classify the following as amorphous or c...

Classify the following as amorphous or crystalline solids: polyurethane, naphthalene, benzoic acid, teflon, potassium nitrate, cellophane, polyvinyl chloride, fibre glass, copper.

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Crystalline solids Benzoic acid, potassium nitrate, copper Amorphous solids. Polurethane, Teflon, cellophane, polyvinyl chloride, fibreglass.
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