Answers: Exercise 3_4 Atom Economy/ Percentage Yield 1. B 2. C 3. C 4. C 5. D 6. A 7. D 8. D 9. C 10. D 11. Method 2 [18% vs 7%] 12. 100% 13. 14. a) 75cm3 b) 2.26g c) 77% Percentage Yield = Actual Yield/ Max. Theoretical Yield X 100 = 1.97/2.55 X 100 = 77% d) 16% 15. a) b) 0.56g c) 55.2cm3/ 0.0552l ii) Yield = actual/theoretical =50.8/55.2 =92.03% iii) Underwater/ gas syringe d) 72.6%