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15-12-2017
Chemistry

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Which of these observations about a crystalline solid material is the BEST indication that the material is a pure substance? A The substance is composed entirely of white crystals. B The substance dissolves completely in water. C The substance melts over a narrow temperature range. D The substance does not vary widely in crystal size.

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kairyp0u0z7 kairyp0u0z7

15-12-2017

C) melts in narrow temperature range

Not all the pure solid substances are white and soluble in water, and the crystal size can be different.

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