Question detail
What is the percentage yield if 20 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. 40%
- B. 50%
- C. 30%
- D. 20%
Answer
40%
Explanation
Percentage yield is calculated using the formula percentage yield = (actual yield / theoretical yield) x 100. Here, percentage yield = (20 g / 50 g) x 100 = 40%.
Common mistake
Common Mistake in Balancing Equations
Students often confuse the masses of reactants and products with their mole ratios when balancing equations.
To fix this, students should first convert the given masses into moles using the relative formula mass before applying the mole ratios from the balanced equation.
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