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An unknown compound X is one of the four compounds listed in the Table below. A mixture of X with benzoic acid melts at 89 degrees Celsius, a mixture of X with phenyl succinate melts at 90 degrees Celsisus, and a mixture of X with m-aminophenol melts at 120 degrees Celsisus. Give the identity of X and explain your reasoning.
Table
Compound m.p. degrees Celsisuso-toluic acid 102benzoic acid 121phenyl succinate 121m-aminophenol 122
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