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Calculate the theoretical yield of stilbene dibromide in the reaction of .5047 g E-stilbene and .99...

Calculate the theoretical yield of stilbene dibromide in the reaction of .5047 g E-stilbene and .99 g pyridinium hydrobromide perbromide if the purity of stilbene dibromide is 96% and the purity of perbromide is 90%.

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