Answer:
90%
Step-by-step explanation:
Actual yield = 45g
Theoretical yield = 50g
Percentage yield (%) = ?
Percentage yield of a substance is the ration between the actual yield to the theoretical yield multiplied by 100
% yield = (actual yield / theoretical yield) × 100
% yield = (45 / 50) × 100
% yield = 0.9 × 100
% yield = 90%
Percentage yield of the compound is 90%