chemistry(college)

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A student reacts benzene,C6H6. with bromine. Br2. in an attempt to prepare bromobenzene.
C6HSBr :
C6H6 + Brl·---·-_·_-> C6HSBr + HBr
(a) What is the theoretical yield of bromobenzene in this reaction when 60.0 g of benzene reacts with 60.0 g Brl?
b) If the actual yield of bromobenzene was 56.7 g • what was the percentage yield?

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