In the following unbalanced reaction, which atom is oxidized?
HNO3 + HBr -> NO + Br2 + H2O
Is the answer bromine?
Aiko here to respond to this question an for the whole test!
I've just finished the test an got the results back an these are all the correct answers, I'm sorry if they change in time! You're welcome in advance to whoever may find this. <3
U7 L2 Chemistry Final Exam (Connexus Academy, Online school)
1. C, small, hard spheres with insignificant volumes
2. A, the atmospheric pressure below sea level is higher.
3. B, some of the absorbed energy is converted to potential energy, and some is converted to kinetic energy
4. A, More molecules have enough energy to overcome the attractive forces holding them in the liquid.
5. C, three dimensions only
6. C, lower
7. A, The pressure will increase.
8. C, the product of the pressure and volume
9. D, contains the same number of molecules
10. B, one-third its pressure at sea level
11. D, diffusion
12. B, hydrogen bonding
13. C, The average diameter of its solute particles usually is less than 1 nm.
14. D, NH₃
15. B, directly proportional to the pressure of the gas above the liquid
16. C, 12M
17. A, 10% (v/v)
18. A, sour taste
19. B, diprotic
20. B, weak base or acid
21. D, the answer cannot be determined
22. D, all of the above
23. B, 0.33 cal/g/°C
24. C, pressure
25. D, standard heat of formation for a compound
26. A, lowering the activation energy barrier
27. A, The reaction makes more products.
28. C, disorder
29. B, reduction
30. B, O₂
31. D, bromine
32. A, Cu²⁺
33. C, oxidation or reduction, but not both
34. B, The graphite rod does not undergo reduction, even though it is the cathode.
35. A, 0.84 V
36. B, electrolysis
37. B, deposition of a metal layer on material
38. D, 4
39. D, C₁₈ H₃₈
40. B, ethyl
41. C, The electron pair is shared almost equally in all the bonds.
42. D, ethane
43. A, 2,2-dimethylbutane
44. D, benzene
45. C, cracking
46. D, saccharide
47. C, functional group
48. D, CH₃CH₂CH₂OH
O
║
49. B, R-C-H
50. C, remains the same
51. D, 4/2He
52. D, alpha radiation
53. A, takes place in the upper atmosphere
54. A, takes place in the sun
55. D, should have a short-half life
(Yes, I know there's 60 questions but I won't be posting the essay questions, so sorry! But I hope have a wonderful day, you beautiful human!! I know school can be hard an stressful just keep calm an keep your head up an never give up.) <3
bromine lol
Aiko I love you you don’t understand how much stress you saved the only class that I was failing so I HAD to pass 😭🙏🏼
Solo I love you
I meant aiko
Thanks for the answers 😎
so what is the answer then
No, bromine is not oxidized but bromide ion is oxidized to bromine.
So then is the correct answer oxygen?
No, of course not. The correct answer is that bromide ion is oxidized.
2Br^- ==> Br2 + 2e so Br^- loses electrons and that is the definition of oxidation. Oxygen has no change in oxidation state; i.e., it is -2 in HNO3 and -2 in H2O and NO.