Question detail
What is the percentage yield if 30 g of product is obtained from a theoretical yield of 50 g?
Try the question, check the answer, then read the explanation to understand the curriculum point.
At a glance
MCQ
Type
practice
Style
Topic
Use of amount of substance in relation to masses of pure substances
Question
- A. 60 %
- B. 75 %
- C. 50 %
- D. 100 %
Answer
60 %
Explanation
The percentage yield is calculated using the formula percentage yield = (actual yield / theoretical yield) x 100. Here, percentage yield = (30 g / 50 g) x 100 = 60%.
Common mistake
Confusing Moles with Mass
Students often confuse the concept of moles with mass, thinking that moles are a measure of weight rather than a measure of the amount of substance.
Remember that moles measure the number of particles (atoms, molecules, etc.), while mass is measured in grams. Use the relationship between mass and moles to clarify this distinction. Keep the correction anchored to Moles (HT only); check formula, substitution, calculation, final answer, and unit where relevant.
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