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BabcockHall last won the day on October 15 2015

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About BabcockHall

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  • Favorite Area of Science
    bioorganic chemistry
  1. I am no bacteriologist, but I seem to recall that E. coli is a facultative anaerobe and can function both aerobically and anaerobically.
  2. Half-Lives (Chemistry)

    An equation for exponential decay is A(t) = A0e(-kt). I would use the information in the problem to calculate the rate constant k, then I would calculate the half-time (t1/2) from the rate constant.
  3. Help in Chemistry

    Please show us your attempts.
  4. Answers A and C are not terribly likely as the question is written. Beyond that, I am not aware of a difference in amino acid content between parallel and antiparallel beta strands. The structure of DNA is not related to this question.
  5. Bonds Pt. 1

    Please show your attempt first, then someone can point you in the right direction.
  6. So far so good. The product is formed in two steps with one intermediate, which is a carbocation. This is an addition reaction. Does that help?
  7. We are here to help you, not to hand out answers. Can you show us your attempt to balance this equation, based upon studiot's hint? Then we can help you.
  8. MrRobin, Giving someone help should not cross over the line into doing their work for them, at least that is what the policies of this forum imply. Please show us please attempt to balance.
  9. Please show your work first, then we can help you.
  10. Can anybody solve it for me?

    Please show what you have attempted so far and give your thoughts.
  11. A is not a reasonable answer, either. Antiparallel strands can be connected by beta-turns, but I don't see how parallel strands could be. As a generalization, I don't see why domains cannot pack against each other. However, I think that answer D is internally inconsistent. See what you can do with that.
  12. Ph ?

    What you wrote about NaOH is unclear. Would you check it? Also, please show your attempt to solve this problem.
  13. Yield % Problem

    So far, I have not found an error. I did see one thing that bothered me a bit, and it could be a clue. It is difficult to see how the protonated form of a phosphine could be a ligand to the metal ion. The unprotonated form would be fine.
  14. Yield % Problem

    It would help the clarity of your question if you defined n, m, and M clearly and unambiguously.
  15. Help with recognising organic redox reactions

    I would assign oxidation numbers to carbon on the basis of ON(C) = (# of bonds to O, N, or X) -(# of bonds to H). In some reactions, one carbon is oxidized while another is reduced, leading to no net oxidation or reduction.