PCl₅ can be produced by the reaction PCl₃ + Cl₂ to PCl₅. What mass of PCl₃ must be used to produce 127 g of PCl₅ if the percent yield is 84.8%?

a. 71.1 g
b. 83.8 g
c. 98.8 g
d. 108 g
e. 150 g