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A polystyrene having the formula Br3C6H3(C8H8)n was prepared by heating styrene with tribromobenzoyl peroxide in the absence of air.If it was found to contain 10.46% of bromine by mass find the value of n

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∴0.1046(314+104n)=240

∴10.87n=240−32.84

n=19.05≈19

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