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Cambridge Secondary (7-9). Stage 9. MCE Science. Workbook - Unit 8: Rate of Reaction - Question 40

Cambridge Secondary (7-9) · Unit 8: Rate of Reaction

Question 40

What is activation energy? Tick (✓) the correct answer.
  1. the energy released during a reaction
  2. the energy stored in reactants
  3. the energy stored in products
  4. the energy required to start a reaction
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