4.2 ANSWERS TO EXERCISES 4.2 Exercise 1 1. i) [N 2 O 4 ] mol -1 dm 3 ii) [CH 3 CH 2 CO 2 CH 2 CH 3 ][H 2 O] no units [NO 2 ] 2 [CH 3 CH 2 CO 2 H][CH 3 CH 2 OH] iii) [HI] 2 no units iv) [SO 3 ] 2 mol -1 dm 3 [H 2 ][I 2 ] [SO 2 ] 2 [O 2 ] v) [NH 3 ] 2 mol -2 dm 6 [N 2 ][H 2 ] 3 2. 0.042 moldm -3 3. 1.33 x 10 -3 moldm -3 4. 56.3 5. 0.2 moldm -3 6. 6.6 mol -2 dm 6 7. 1013 mol -1 dm 3 8. 3.2 x 10 -4 moldm -3 9. 46.3 mol -2 dm 6 10. 4.12 11. 12 moldm -3
