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  1. mamoon123

    Physics: Post your doubts here!

    Need help with question 21. Oh and can somebody tell me the difference between accuracy and precision? :x http://papers.xtremepapers.com/CIE/Cambridge%20International%20A%20and%20AS%20Level/Physics%20(9702)/9702_w05_qp_1.pdf
  2. mamoon123

    Physics: Post your doubts here!

    Cheers mate! I owe you one :)
  3. mamoon123

    Physics: Post your doubts here!

    Just a thought, if in the structured paper the mark scheme says an answer is 4.2 and my answer is 4.19, will I lose the accuracy (A1) mark? (This would be ironic, because I'd actually be more accurate than the answer itself e.e)
  4. mamoon123

    Physics: Post your doubts here!

    How do we solve questions 14, 19 and 20 in this paper: http://papers.xtremepapers.com/CIE/Cambridge%20International%20A%20and%20AS%20Level/Physics%20(9702)/9702_s09_qp_1.pdf
  5. mamoon123

    Chemistry: Post your doubts here!

    Every paper (i.e: MCQs, Structured and Practical) holds a specific weightage.
  6. mamoon123

    Chemistry: Post your doubts here!

    Ah, didn't see that it was excess. A thousand pardons.
  7. mamoon123

    Chemistry: Post your doubts here!

    Can you specify the year you got this question from? The paper variant as well.
  8. mamoon123

    Chemistry: Post your doubts here!

    Is the answer C?
  9. mamoon123

    Chemistry: Post your doubts here!

    Cheers (y) Glad I could be of help.
  10. mamoon123

    Chemistry: Post your doubts here!

    Asalam alaikum brother. Is the answer A? In questions like these you have to keep in mind ALL the products that would be produced if the reactant is mixed separately with the substance in the options and all the required conditions are met. I'll start with the incorrect one's first. B) HCl...
  11. mamoon123

    Chemistry: Post your doubts here!

    XCO3 + 2HCl ---> XCl2 + H2O + CO2 2.80g of XCO3 (ignore it for now) x mol of XCO3 react with 2x mol of HCl Moles of HCl = Volume(cm^3) multiplied by concentration(mol dm-3) DIVIDED by 1000 --> (50*2.00) / 1000 --> 0.1 mol Compare the mole ratio. If 2x = o.1 mol then x = 0.05 mol Now that you...
  12. mamoon123

    Chemistry: Post your doubts here!

    Asalam alaikum. Can anybody please tell me how we can solve question 38 and 40 in this paper (oct nov 2009) http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Chemistry (9701)/9701_w09_qp_12.pdf Can you please tell me all the reactions that can occur using the same...
  13. mamoon123

    Official Discussion- IGCSE Summer Session Results

    Maths - A* Physics - A* Biology - A* Chemistry - A* Urdu - A English - A
  14. mamoon123

    Pakistan Studies, Islamiyat and Urdu: Post your doubts here!

    110? But isn't paper 2 worth 60 marks?
  15. mamoon123

    Pakistan Studies, Islamiyat and Urdu: Post your doubts here!

    95/115 in Urdu B. What grade do you guys think this is?
  16. mamoon123

    Plz people grade me on my subjects!

    Maths = A* Physics = A* Chemistry = A* Biology = A* English = A or B Congratulations on those remarkable grades :)
  17. mamoon123

    What Grades You are ExpectINg.......

    I wouldn't get my hopes up if I were you. An A* in Islamiat is super, super, SUPER hard. Trust me, my paper went epic and I was expecting a distinction, but they trolled me hard. :/
  18. mamoon123

    Chemistry paper SO EASYY!!

    D here too.
  19. mamoon123

    BIOOOOOOOOOOOOOLLLOOOOGY PAPER 1 VARIENT 2

    Look at this:
  20. mamoon123

    Chemistry paper SO EASYY!!

    Yes :D
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