Question detail
A product creates 150 kg of waste and 30% is recycled. Which option gives the mass of waste recycled?
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. 30 kg
- B. 40 kg
- C. 45 kg
- D. 50 kg
Answer
The correct option is 45 kg. 30% of 150 kg is 0.30 ? 150 = 45 kg. 30 kg, 40 kg and 50 kg do not correctly apply the percentage to the total waste mass.
Explanation
The correct option is 45 kg. 30% of 150 kg is 0.30 ? 150 = 45 kg. 30 kg, 40 kg and 50 kg do not correctly apply the percentage to the total waste mass. 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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