A compound's literature melting point is118°C under normal atmospheric pressure. Which of the following samples must have the highest percentage of the compound? (experimental melting point ranges are given) a. Sample 1 (MP 108-116 degree C) b. Sample 2 (MP 113-114 degree C) c. Sample 3 (MP 115-117 degree C) d. Sample 4 (MP 120-127 degree C)

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