Question

A student performs an experiment with a calculated theoretical yield of 50.0 grams. After collecting and drying the product, they measure its mass to be 45.0 grams. What is the percentage yield of the reaction?


111%

90%

5%

Answer 1

Percentage yield = (actual ÷ theoretical) × 100 = (45.0 ÷ 50.0) × 100 = 90%.