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If 119.3 g of PCl5 (molar mass = 208.2 g/mol) are formed when 61.3 g of Cl₂ (molar mass = 70.91 g/mol) react with excess PCl3, what is the percent yield for the reaction?
a. 90.0%
b. 70.0%
c. 60.0%
d. 80.0%