The melting point (mp) range of reference compound A is 320-340°C. The mp range of a 1:1 mixture of a sample of A with a sample of unknown compound B is found to be 140-300°C. Do the samples consist of identical compounds? Yes, because they melt over a broad range. Yes, because the mp of the mixture is lower than the mp of pure A. No, because the mp of the mixture is lower than the melting point of pure A. Not enough information is given to answer the question
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