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Explain what weight of bezene is required to prepare 100 g of phenol (C6H5OH) according to the following series of reactions? Since these reactions don't yield 100%, the yield of each product is indicated.

C6H6 + Cl2 = C6H5Cl + HCl (75% C6H5Cl)

C6H5Cl + NaOH == C6H5OH + NaCl (50% yield of phenol)

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