Chemistry

a student carefully measures the melting point of a solid material. she measures the range to be 81.2 - 83.7 degree. assuming she has done the measurement correctly. what can she conclude about the sample, and why

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  1. It is not a pure sample because the melting point range is too large.

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  2. Can DrBob222 please explain why it is not a pure sample?
    Thank you in advance.

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