Recent content by CrazyNinja

  1. CrazyNinja

    B Doppler effect/ both moving same direction

    It would have been better if you had precisely mentioned what "u", "uo" and "us" are in the equation you have written. The equation is valid in all situations provided you know what "u", "uo" and "us" are in the given equation. This also matches with my previous statement about shifting...
  2. CrazyNinja

    What to Expect as a New Forum Member?

    :welcome: Feel free to check out the forums and post..! If you have a question feel free to ask me or better, ask any of the mentors.
  3. CrazyNinja

    How to Balance PhCHO + SF4 Reaction

    Your last compound is wrong. The sulphur shall have a -ve charge due to accumulation of another pair of electrons and the carbonyl carbon shall have +ve charge. That should help you get the mechanism. Post that, think about the stability of the sulphur and how it can become more stable.
  4. CrazyNinja

    Organic Chemistry: Sn2 Reactions - proposing a synthesis

    I really think you should go back to the drawing board and re-understand the principles of substitution and addition. In addition to the site that @Ygggdrasil mentioned, you could also look at the following site : http://www.chemguide.co.uk/mechmenu.html#top
  5. CrazyNinja

    Oxo acids, attraction between Y element and oxygen

    Here is how I understood it when I learned it. Hope it helps you too. When we compare oxoacids across a group the strongest oxacid is the one which has the highest EN. This is because if the element has high EN it can pull the shared electrons of O-Y bond with greater ease. Now oxygen, by...
  6. CrazyNinja

    Which Metals Can Nickel Reduce?

    Yes your answer is correct.
  7. CrazyNinja

    B Doppler effect/ both moving same direction

    Yes true. The velocity of sound with respect to the medium gets adjusted accordingly.
  8. CrazyNinja

    B Doppler effect/ both moving same direction

    If you have a good idea of how Doppler Effect works when one is at rest then just shift your reference frame to one in which either of the moving objects is at rest. Then the unknown problem turns into a known situation.
  9. CrazyNinja

    What Forms the Green-Blue Precipitate with Chromium (III) Ions and NaOH?

    Point one I didnt get this statement from you. Ions can't have anions. I think you had a moment of confusion and wrote something else other than what you intended. Coming to the question, why don't we use the method of elimination? Since the NaOH is (aq) it can't be a strong enough oxidising...
  10. CrazyNinja

    I am sure I am doing this Acid/Base problem wrong

    Can we say impossible to solve? The solubility product of Al(OH)3 is absolutely essential.
  11. CrazyNinja

    How do covalent bonds of the same molecule form?

    If you consider the noble elements, there is also the London forces (also called van der Waals' forces) to consider.
  12. CrazyNinja

    Total Entropy Change of Iron & Water: 2.2 J/K

    @Chestermiller ... Hello! I was just looking this problem up to understand the concept of entropy better and I was wondering if you could tell me what the advantages of the second method are over the first. Is it only that it allows us to let us use the limit (as in let it tend to anything we...
  13. CrazyNinja

    Spectator Ions and Molarity Questions

    Thank you for your help @Borek ! Is that the end of the solution or is there more?
  14. CrazyNinja

    Spectator Ions and Molarity Questions

    Silver and carbonate were ions before and became part of a precipitate. Now they are not part of the solution. So these are the reactants?
  15. CrazyNinja

    Spectator Ions and Molarity Questions

    OK I am unable to figure this out. I don't know what it tells me about the reaction, but I do understand that NH4+ and NO3- react. No. They remain as they are and form NH4NO3. Does this mean they are not the reactants? OK I could listen to epenguin and google it up. But I don't like Google...
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