QUESTIONS AND PROBLEMS: 1) The box below represents another chromatogram. The solid line is the origin; the dotted line is the solvent front. "Substance A " and "Substance B" are represented by spots (crosses showing the center of the spot) on the origin line. a) Calculate the R1 for "Substance A " which reaches point x (center of the spot for "Substance A ") in this solvent. Show work. b) "Substance B has an R, of 0.450 in this experiment. Solve the equation Rf=MigrationdistanceofsolventfintMigrationdistanceofsubstance(tothecenterofthespot) for the migration distance of solvent front plot the migration distance of "Substance B in the space below and the spot for "Subion distance for "Substance B" (show the center of Migration distance of Substance B = 2) A quality control technician performed a melting point experiment on the aspirin made by some pharmaceutical company. He noted that the aspirin began to melt at 125C and was completely melted at 133C. He repeated the experiment two more times taking great care to watch the solid. The results were the same. The melting point of aspirin is given as 135C. Based on these results, did the quality technician allow the company to sell the product? Explain your