\text { For the reaction: } \mathrm{C}_{6} \mathrm{H}_{6}+\mathrm{Br}_{2} \rightarrow \mathrm{C}_{6} \mathrm{H}_{5} \mathrm{Br}+\mathrm{HBr} \text { a. What is the theoretical yield of } \mathrm{C}_{6} \mathrm{H}_{5} \mathrm{Br} \text { if } 42.1 \mathrm{~g} \text { of } \mathrm{C}_{6} \mathrm{H}_{6} \text { react with } 73.0 \mathrm{~g} \text { of } \mathrm{Br}_{2} \text { ? } b. If the actual yield of C6H5B is 63.6 g, what is the percent yield?

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