Answer:
See explanation
Step-by-step explanation:
Mass of impure compound A = 117 mg
Mass of impure compound B = 89 mg
Mass of pure compound A = 93 mg
Mass of pure compound B = 83 mg
Percentage recovery of pure compound A = 93 mg/117 mg * 100 = 79.5 %
Percentage recovery of pure compound B = 83mg/89 mg * 100/1 = 93.3 %