• We need your support!

    We are currently struggling to cover the operational costs of Xtremepapers, as a result we might have to shut this website down. Please donate if we have helped you and help make a difference in other students' lives!
    Click here to Donate Now (View Announcement)

Search results

  1. Pals_1010

    Chemistry: Post your doubts here!

    Error carried forward? That means you still get the full marks for the next part? Even if the value in the first part is wrong?
  2. Pals_1010

    Chemistry Paper 33 Purity% answer of CaCO3 and what were the metal and anions

    I got something like 76.6% for the purity...
  3. Pals_1010

    how did chem p12 go?

    GT should be about 30...
  4. Pals_1010

    Chemistry: Post your doubts here!

    Hello how do you look for a chiral carbon atom in a cyclic or aromatic compound please? Thx :)
  5. Pals_1010

    Chemistry: Post your doubts here!

    If the first division was 0.5 then the second division should be 1.0 then A isnt correct. As 1.0 moles of oxygen doesnt correspond to Al
  6. Pals_1010

    Chemistry: Post your doubts here!

    I know... Am confused but marking scheme says D :(
  7. Pals_1010

    Chemistry: Post your doubts here!

    Yeah but how can SO3 be formed just by burning in excess oxygen?
  8. Pals_1010

    Chemistry: Post your doubts here!

    Mg + (0.5)O2 -------> MgO (No of moles of Oxygen used 0.5) Al + (0.75)O2 --------> (0.5)Al2O3 (No of moles used 0.75) S + O2 --------> SO2 (No of moles used 1) I think in A the scale on the vertical axis wouldnt be good. Any idea?
  9. Pals_1010

    Chemistry: Post your doubts here!

    Why is the answer D? Not C? Shouldnt Sulphur form SO2 on complete combustion? This looks like SO3 was formed in D?
  10. Pals_1010

    Chemistry: Post your doubts here!

    http://www.xtremepapers.com/papers/CIE/Cambridge%20International%20A%20and%20AS%20Level/Chemistry%20(9701)/9701_w05_qp_1.pdf Help please with Question No 12? Thank you :)
  11. Pals_1010

    Chemistry: Post your doubts here!

    Thank You So Much :)
  12. Pals_1010

    Chemistry: Post your doubts here!

    http://www.xtremepapers.com/CIE/index.php?dir=International%20A%20And%20AS%20Level/9701%20-%20Chemistry/&file=9701_w04_qp_1.pdf Question 12, question 23, question 24, question 36, question 37 and question 38 please? Thank You
  13. Pals_1010

    Chemistry: Post your doubts here!

    Thanks but why ''4-2x'' for the concentration of NO2?
  14. Pals_1010

    Chemistry: Post your doubts here!

    http://www.xtremepapers.com/CIE/International%20A%20And%20AS%20Level/9701%20-%20Chemistry/9701_w07_qp_1.pdf Question 10 please?
  15. Pals_1010

    Chemistry: Post your doubts here!

    Aaaah ok.... I guess I missed that part :) Thanks
  16. Pals_1010

    Chemistry: Post your doubts here!

    Hello I would need help with Nov 2003 MCQ Question 40 please? Why is the answer D and not B? Thanks http://www.xtremepapers.com/CIE/International%20A%20And%20AS%20Level/9701%20-%20Chemistry/9701_w03_qp_1.pdf
  17. Pals_1010

    Physics: Post your doubts here!

    Thank you ^^
  18. Pals_1010

    Physics: Post your doubts here!

    http://www.xtremepapers.com/CIE/index.php?dir=International%20A%20And%20AS%20Level/9702%20-%20Physics/&file=9702_s09_qp_1.pdf Help with No 15 and No 18 please?
  19. Pals_1010

    Physics: Post your doubts here!

    Hello I would need help with no 21 please? Thank you
  20. Pals_1010

    Chemistry: Post your doubts here!

    The activation energy does not affect the enthalpy change. See? Finally the enthalpy change is unaffected by whether the activation energy is high or not.
Top