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Recent content by zeena123

  1. Z

    Stats GT speculations here

    Me too. Wasn't confident about ANY answer. Sick paper.
  2. Z

    Stats GT speculations here

    I did horrible, just wish the GT is low. I did really well in P3, I don't want S1 to bring it down :(
  3. Z

    maths p62

    It was a bad paper. Didn't have enough time to finish :/
  4. Z

    Chemistry P4 Help needed

    Those numbers indicate the molecular mass of each fragment. So, you should take different fragments of the original molecule and make sure each fragment satisfies the molecular mass, by trial and error.
  5. Z

    Chemistry P4 Help needed

    For the first part of that question you need to take the Mr of 2,3- dibromoprpan-1-ol. And the second part you just need to take fractions and get the numbers they require. Thats my understanding.
  6. Z

    Chemistry P4 Help needed

    I see now. Thank you :)
  7. Z

    Chemistry P4 Help needed

    It is due to increasing Van der Waals' forces.
  8. Z

    Chemistry P4 Help needed

    And how is it that the answer to the last part of this question is Aspartic acid/ lysin.
  9. Z

    Chemistry P4 Help needed

    You mean question 8.b? Find the E values from data booklet for PbO2 + 4H+ +2e ---> Pb2+ + 2H2O and the other reaction and then the more positive value minus the less positive will give you the E of cell.
  10. Z

    Chemistry P4 Help needed

    Also, in the same paper (43/M/J/10) question 7.d.i doesn't make sense to me. How do we know what the chain is supposed to be?
  11. Z

    Chemistry P4 Help needed

    Tell me why in May/June 2010/ 43, question 2.b.i they take the lattice energy as positive? It doesn't make any sense.
  12. Z

    physics p5 discussion

    What do they mean when they say, "An explicit statement is required."?
  13. Z

    physics p5 discussion

    If, for example, we have an error of +/- 4, when plotting a graph, does that mean that we have to take 2 points below the point and 2 above. Or do we take 4 points above the point and 4 below? I'm confused about this.
  14. Z

    physics p5 discussion

    Thank you :)
  15. Z

    physics p5 discussion

    How to find the error when finding the y-intercept? (For example, Oct/Nov 2007. Question 2- iv.)
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