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  1. F

    May/June 2015 gt.

    So essentially an A*is around 85%. That's a relief. I just have 3 papers left. How was economics p2 for you all?
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    Biology 5090 May/June 2015 question Queries?

    It's insect-pollinated. The plant's actual name is Indian Pipe. Check the internet. I dunno what the mark scheme will accept. But if it's insect-pollinated, can it be self-pollinated? If the answer to that question is yes, then they should accept your answer as well. I really am not one to...
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    Ticl4 ionic or covalent?

    Covalent. Simple molecular structure. Check Wikipedia.
  4. F

    chemistry atp

    The one where you had to subtract the initial mass from the final mass. At the initial stages of the titration thing.
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    CIE 2015 O level Candiate

    Bio P6 is out of 40. English P1 56-59/60 Physics P4 28-30/30 Biology P6 38-40/40 Chemistry P4 57-60/60
  6. F

    chemistry atp

    It was 16.11g. And pipette (pipette measures 25cm3 or 50cm3; measuring cylinder above 100cm3 accurately).
  7. F

    chemistry atp

    It's definitely 8.2g. They asked for what mass remained. So you had to subtract 1.8g from 10g.
  8. F

    chemistry atp

    Do you mean C2H5OH for X and C4H9OH for Z? I wrote the same thing.
  9. F

    chemistry atp

    Percentage of N in (NH4)2SO4 was 21.2%. The titration answers were something like these: 25.3 cm^3 0.000506 mol 0.00253 mol 0.0253 mol 1.4168 g (I wrote this as 1.42 g because of the Mark Scheme's strict adherence to the 3 s.f. thing) 8.79% (I got 8.81%) I am confused about the alcohol thing...
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    Physics ATP- 5054/42, May/June 15 Questions

    English went fairly okay. Regarding Physics ATP 42, Stride length: I wrote 40cm (is this okay?) List additional apparatus: Thermometer, stopwatch Adjusting apparatus: Hold thermometer such that meniscus is in line of sight to avoid parallax error and hold thermometer in clamp without it touching...
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    chemistry atp

    Variant 42. Can anyone tell me what alcohol X and Z were? Yes, the first and third reading were the best results. You should get around 1.42g FeSO4 at the end.
  12. F

    chemistry atp

    I actually got 8.81% FeSO4 because I used 3 significant figures
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