Question detail
A product uses 600 grams of material and 10% is wasted during production. Which option gives the wasted mass?
Try the question, check the answer, then read the explanation to understand the curriculum point.
At a glance
MCQ
Type
practice
Style
Topic
Life cycle assessment and recycling
Question
- A. 50 grams
- B. 60 grams
- C. 70 grams
- D. 80 grams
Answer
The correct option is 60 grams. 10% of 600 grams is 0.10 ? 600 = 60 grams. 50, 70 and 80 grams are incorrect because they do not match the production-waste percentage calculation.
Explanation
The correct option is 60 grams. 10% of 600 grams is 0.10 ? 600 = 60 grams. 50, 70 and 80 grams are incorrect because they do not match the production-waste percentage calculation. This keeps the answer anchored to AQA GCSE Chemistry Unit 4.10 Using resources and avoids confusing neighbouring resource, material, water-treatment, LCA, Haber process or fertiliser ideas.
Common mistake
Misunderstanding Decimal Use
Students often confuse the use of decimals with whole numbers when interpreting LCA data, leading to incorrect calculations.
Practice converting whole numbers to decimals and ensure to use appropriate decimal places based on the context of the data.
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