Question detail
For Atom economy, which ratio reasoning answer best supports this Unit 4.3 objective: (chemistry only) Identify the desired product when calculating atom economy?
Try the question, check the answer, then read the explanation to understand the curriculum point.
At a glance
MCQ
Type
practice
Style
Topic
Yield and atom economy of chemical reactions (chemistry only)
Question
- A. 75%
- B. Wrong ratio reasoning: confuses chemistry only with a nearby Unit 4.3 idea
- C. Wrong unit check: uses the wrong unit for Atom economy
- D. Wrong calculation link: does not support (chemistry only) Identify the desired product when calculating atom economy
Answer
The correct option is 75%. The calculated answer is 75 %.
Explanation
The correct option is 75%. This uses Percentage Yield because the objective is about (chemistry only) Identify the desired product when calculating atom economy. This ratio reasoning variant asks students to separate chemistry only from similar Unit 4.3 calculation steps. The reasoning belongs to Atom economy within Yield and atom economy of chemical reactions (chemistry only), so it should not be confused with nearby quantitative ideas such as mass, moles, concentration, yield, atom economy, or gas volume unless those are named in the objective. Use the focus term chemistry only to keep the answer aligned with AQA GCSE Chemistry 8462 Unit 4.3. The other options are weaker because they either use the wrong formula, the wrong unit, a vague relationship, or the wrong quantitative context.
Common mistake
Confusing Desired Product
Students often misidentify the desired product when calculating atom economy, leading to incorrect calculations.
Carefully read the question to determine which product is specified as the desired product before proceeding with the atom economy calculation.
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