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  1. sazzabazza

    Physics Paper 3 2012 discussion (I have the qp)

    I'm an "other", I multiplied it by 120 because we don't know how long each lightning strike lasted, so we multiply by the interval as that is equivalent to the total energy of one strike!!!
  2. sazzabazza

    Prediction of Grade Thresholds for May-June 2012!

    The gt you posted was for the winter session though! The grade boundary is always higher during winter, due to people retaking after the summer session. If you look at the may/ june gt for last year: http://www.xtremepapers.com/papers/CIE/Cambridge%20IGCSE/Biology%20(0610)/0610_s11_gt.pdf...
  3. sazzabazza

    To get an A* in either Biology or chemistry ?

    Do you think the total grade boundary for an A* would rise to about 160 this year for variant 1?
  4. sazzabazza

    Chemistry P31

    I think that it won't be higher than around 150-55. My teachers have been saying that the A* grade boundary never goes above 80% for any of the sciences.
  5. sazzabazza

    Chemistry P31

    I said that you had to measure the time taken for the experiment as well as the mass of the rust deposited.
  6. sazzabazza

    Chemistry P31

    I think it was 2-3.
  7. sazzabazza

    Chemistry P31

    It clearly stated that B to A was the electron flow!
  8. sazzabazza

    Chemistry P31

    If there's a decrease in the positive oxidation state of an ion that means it has gained electrons (reduction). Since Vanadium gains electrons it is the oxidising agent (oxidant) because it is taking electrons away
  9. sazzabazza

    Chemistry P31

    That would mean oxidation and reduction is occurring at the same time, explain how B is gaining electrons.
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