In the analysis of the products of a synthesis using thin layer chromatography, spots were observed to have risen distances of 21, 34, 38, and 41 mm up the silica-coated plate, with the solvent front rising to 55 mm. In an analysis of one of the starting materials using the same solvent and type of plate, the spot for the pure compound was observed to rise through 38 mm with the solvent front rising through 62 mm. Which of the spots from the product mixture corresponds to the starting material?
A) 21 mm
B) 34 mm
C) 38 mm
D) 41 mm
Correct Answer:
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