its one question several parts please answer all parts please

2 Melting Point? Based on your experiences in organic chemistry laboratory, how would you confirm the identity and purity of the recovered Plavix? You must be specific in your answer. (2) student was recrystallizing a compound. As the hot solution cooled to room temperature, 10 crystals appeared. The flask was then placed in an ice-water bath. Suddenly a large amount of solid material appeared in the flask. The student isolated a good yield of product, however, the product was contaminated with impurities. Explain. (2 pts) You have recovered 743 grams of the Plavix from the original 25 kilogram that was spilled What would be the percent yield recovery of Plavix based on these numbers? Show your calculations in order to receive credit. (5 pts) Calculated work Final percent yield