• 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. H

    Chemistry: Post your doubts here!

    Yes but we need to use the concentration of Ag(NH3)2 not of silver nitrate
  2. H

    Chemistry: Post your doubts here!

    Because at first the concentration is of Ag+ is 0.1 then it is reduced to 7 x 10^-7 . As it is 1:1 mole ratio shouldn't the concentration of the product increase by 0.1 - 7 x 10^-7 ?
  3. H

    Chemistry: Post your doubts here!

    how about this question ? Value in c(i) is 7 x 10^-7 . in the mark scheme it's written concentration of product if 0.1 but shouldn't it be 0.1 - (7 x 10^-7 )?
  4. H

    Chemistry: Post your doubts here!

    Isn't it 400 for D ?
  5. H

    Chemistry: Post your doubts here!

    Thank you Can you please explain this ?
  6. H

    Chemistry: Post your doubts here!

    Can you please explain this ?
  7. H

    Chemistry: Post your doubts here!

    7.1 x 10^-7
  8. H

    Chemistry: Post your doubts here!

    Can someone explain this ?
  9. H

    Chemistry: Post your doubts here!

    Can you help me in this ? in the mark scheme, it's written the concentration of the complex is 0.1. Shouldn't it be 0.1 minus the concentration of c(i) ?
  10. H

    Chemistry: Post your doubts here!

    How about the chlorine that replaces the hydrogen in the first step. what mechanism is that ?
  11. H

    Chemistry: Post your doubts here!

    (iii) why is the mechanism nucleophilic ? isn't it electrophilic with respect to the organic compound ?
  12. H

    Chemistry: Post your doubts here!

    So it is not (OH)2(H2O)4 ?
  13. H

    Chemistry: Post your doubts here!

    When NH3(aq) is added to a green solution containing Ni2+(aq) ions, a grey-green precipitate is formed. This precipitate dissolves in an excess of NH3(aq) to give a blueviolet solution. Suggest an explanation for these observations, showing your reasoning and including equations for the...
  14. H

    Physics: Post your doubts here!

    How do you answer this ?
  15. H

    Physics: Post your doubts here!

    How do you draw the second graph ?
  16. H

    Physics: Post your doubts here!

    http://papers.xtremepapers.com/CIE/Cambridge%20International%20A%20and%20AS%20Level/Physics%20(9702)/9702_s04_qp_4.pdf Question 6 Explanation please
  17. H

    Physics: Post your doubts here!

    http://papers.xtremepapers.com/CIE/Cambridge%20International%20A%20and%20AS%20Level/Physics%20(9702)/9702_w12_qp_43.pdf Q12 b(ii) what do you mean by uninterrupted length and how do you solve this question ?
  18. H

    Physics: Post your doubts here!

    http://papers.xtremepapers.com/CIE/Cambridge%20International%20A%20and%20AS%20Level/Physics%20(9702)/9702_s08_qp_4.pdf Q6 a and b explanation please
  19. H

    Physics: Post your doubts here!

    http://papers.xtremepapers.com/CIE/Cambridge%20International%20A%20and%20AS%20Level/Physics%20(9702)/9702_s13_qp_41.pdf Q11 b(iii)
  20. H

    Mathematics: Post your doubts here!

    Can someone please explain how to get a second vector for the question (ii) for the vector product ?
Top