Question detail
In a reaction, the theoretical yield of a product is 120 g, but only 90 g is obtained. What is 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
Yield and atom economy of chemical reactions (chemistry only)
Question
In a reaction, the theoretical yield of a product is 120 g, but only 90 g is obtained. What is the percentage yield of the reaction?
Answer
75 %
Explanation
This answer is correct because it directly supports the approved learning objective: (chemistry only) Define yield as the amount of product obtained from a reaction. It stays inside Percentage yield, uses chemistry only as the revision focus, and gives the Chemistry reasoning needed for an exam-style response.
Common mistake
Confusing Yield Definition
Students often confuse yield with the theoretical yield, thinking it refers to the maximum possible amount of product rather than the actual amount obtained.
Clarify that yield specifically refers to the actual amount of product obtained from a reaction, not the theoretical maximum.
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