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  1. lavanyamane

    paper 12 chemistry ...

    No, the percentage by mass was C i think.. definitely not 50-50
  2. lavanyamane

    paper 12 chemistry ...

    Actually, in pV=nRT, volume is supposed to be in m^3, not dm^3. And you're right about the temperature.
  3. lavanyamane

    paper 12 chemistry ...

    It was B
  4. lavanyamane

    paper 12 chemistry ...

    My paper was great! Definitely an A :)
  5. lavanyamane

    Haha it's my picture (:

    Haha it's my picture (:
  6. lavanyamane

    Haha! That's quite alright. Thank you!

    Haha! That's quite alright. Thank you!
  7. lavanyamane

    Chemistry: Post your doubts here!

    Q5: no. of Ni atoms in 1 mol (58.7 g) = 6.02x10^23 hence, 20% of 10 = 2 g. In 2 g of Ni, no. of atoms = (2 x 6.02x10^23) / 58.7 = 2.05 x 10^22 Q10: i don't know! Q12: H:O = 1:16 So, 16H = 1 Oxygen and the answer is C10H16O Q21: The compound in the picture is part ester. It...
  8. lavanyamane

    Chemistry: Post your doubts here!

    It should be decreased.
  9. lavanyamane

    Chemistry: Post your doubts here!

    Thank you so much! Life saver! :D
  10. lavanyamane

    Chemistry: Post your doubts here!

    http://www.xtremepapers.com/papers/CIE/Cambridge%20International%20A%20and%20AS%20Level/Chemistry%20(9701)/9701_s08_qp_1.pdf Q.6 please?
  11. lavanyamane

    How was Math P1??????

    Ah well, thank you :)
  12. lavanyamane

    Chemistry: Post your doubts here!

    http://www.xtremepapers.com/papers/CIE/Cambridge%20International%20A%20and%20AS%20Level/Chemistry%20(9701)/9701_s08_qp_1.pdf Q.2 please?
  13. lavanyamane

    Chemistry: Post your doubts here!

    http://www.xtremepapers.com/papers/... AS Level/Chemistry (9701)/9701_s10_qp_11.pdf Q.5, Q.11 please?
  14. lavanyamane

    Chemistry: Post your doubts here!

    Yes :)
  15. lavanyamane

    Chemistry: Post your doubts here!

    2 molecules of the same compound. Eg: Al3Cl6 is a dimer of AlCl3
  16. lavanyamane

    Chemistry: Post your doubts here!

    Q.8 - Sorry Q.4 - Bonds broken: 1077 + 2x436 = 1949 (bond breaking is endothermic, therefore +ve value) Bonds formed: 3x410 + 360 + 460 =-2050 (bond forming is exothermic, therefore -ve value) -2050+1949 = -101
  17. lavanyamane

    Chemistry: Post your doubts here!

    http://www.xtremepapers.com/papers/CIE/Cambridge%20International%20A%20and%20AS%20Level/Chemistry%20(9701)/9701_s10_qp_11.pdf Q.5, Q.11 please?
  18. lavanyamane

    How was Math P1??????

    I did 12 and it was alright. Completely left AP and GP, plus i didn't have time to solve the trigo question. I'm on a B grade level, which sucks.
  19. lavanyamane

    Physics: Post your doubts here!

    http://www.xtremepapers.com/CIE/index.php?dir=International%20A%20And%20AS%20Level/9702%20-%20Physics/&file=9702_s11_qp_11.pdf Q. 31, please?
  20. lavanyamane

    All chemistry Doubts here :)

    I don't understand this stuff well enough to explain to to somebody, so sorry x
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