Answer
18.93 g Br.
Work Step by Step
Grams of Br= $25.00\,mL\,C_{2}HBrClF_{3}\times\frac{1.871\,g\,C_{2}HBrClF_{3}}{1\,mL\,C_{2}HBrClF_{3}}\times\frac{1\,mol\,C_{2}HBrClF_{3}}{197.4\,g\,C_{2}HBrClF_{3}}\times\frac{1\,mol\,Br}{1\,mol\,C_{2}HBrClF_{3}}\times\frac{79.904\,g\,Br}{1\,mol\,Br}$
$=18.93\,g\,Br$
