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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 naphthalene, benzoic acid, potassium nitrate, copper.
Amorphous solids Polyurethane, teflon, polyvinyl chloride, fiber glass, cellophane.
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