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Case 77 formula-choice. A student starts a worked solution. Which first step is most appropriate? Focus on ratios fractions and percentages yield calculations in Percentage yield, not on a neighbouring Unit 4.3 idea.
- A.Case 77 formula-choice: Use the named relationship before substituting numbers for ratios fractions and percentages yield calculations
- B.Case 77 formula-choice: Start with a memorised answer and add a unit later (Percentage yield)
- C.Case 77 formula-choice: Change every number into a percentage before choosing a formula (ratios fractions and percentages yield calculations)
- D.Case 77 formula-choice: Use a nearby formula from a different quantitative chemistry subtopic (Yield and atom economy of chemical reactions (chemistry only))
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