Question detail
A reaction produces 50 g of product from 40 g of reactants. Calculate the percentage yield of the reaction.
Try the question, check the answer, then read the explanation to understand the curriculum point.
At a glance
Question
Type
exam_style
Style
Topic
Chemical measurements, conservation of mass and the quantitative interpretation of chemical equations
Question
A reaction produces 50 g of product from 40 g of reactants. Calculate the percentage yield of the reaction.
Answer
125
Explanation
The answer is strong because it correctly applies the percentage yield formula to determine how efficient the reaction was in producing the desired product. This question tests the understanding of yield calculations in chemistry.
Common mistake
Misunderstanding Mass Conservation
Students often think that the mass of reactants and products can differ if gases are involved, not realizing that the total mass remains constant.
Emphasize that the law of conservation of mass states that no atoms are lost or gained, so the total mass of reactants must equal the total mass of products, regardless of the state of matter. Keep the correction anchored to Relative formula mass; check formula, substitution, calculation, final answer, and unit where relevant.
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