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  1. S

    Chemistry: Post your doubts here!

    [Fe2+] = 1.5 × 10–3 × 1000/2.5 = 0.6 (mol dm–3) ecf from (iv) Your ans is right :) I got stuck myself at this stage : " Original Solution: Fe3+ = 1.5 in 1000 so 0.15 in 100 Solution after dissolving copper several times: Fe2+ = Answer to part v/10 =0.6/10 = 0.06 Remaining Fe3+ = 0.15 - 0.06...
  2. S

    Chemistry: Post your doubts here!

    1 b(vi)
  3. S

    Chemistry: Post your doubts here!

    On 2009 , va'42 q5
  4. S

    Chemistry: Post your doubts here!

    Which Can be coplaner and which CAnt ? ?
  5. S

    Chemistry: Post your doubts here!

    AbbbbY asma tareen
  6. S

    Physics: Post your doubts here!

    Can someone Help with Graph : question 9b(ii)
  7. S

    Further Mathematics: Post your doubts here!

    Part (i) > No idea ' Part (ii) > just tell me what will be distance from centre of mass of triangle to AB &why
  8. S

    Physics: Post your doubts here!

    MS : force on mass = mg (where g is the acceleration of free fall /gravitational field strength) g = GM/r^2 if r @ h, g is constant ΔEP = force × distance moved = mgh
  9. S

    Mathematics: Post your doubts here!

    Can you solve part iii ,
  10. S

    Mathematics: Post your doubts here!

    Lets suppose next time they asked greatest value , then which side we need to find ??
  11. S

    Chemistry: Post your doubts here!

    q7a(iv) / q5b(iv) AbbbbY
  12. S

    Chemistry: Post your doubts here!

    Mj2013
  13. S

    Chemistry: Post your doubts here!

    Ans should be C(CH2)4 (OH)2 but its C(CH2OH)4
  14. S

    Chemistry: Post your doubts here!

    Meaning of Cl being inside ?
  15. S

    Chemistry: Post your doubts here!

    Which varient will you be doing this yr ?
  16. S

    Chemistry: Post your doubts here!

    Thanks , :) if you can little more expand " fragments and residues " , i mean whats the difference , we use the word fragments only in mass spectrometer :P
  17. S

    Chemistry: Post your doubts here!

    http://papers.xtremepapers.com/CIE/Cambridge%20International%20A%20and%20AS%20Level/Chemistry%20(9701)/9701_s04_qp_4.pdf 6 e
  18. S

    Mathematics: Post your doubts here!

    Thats what i am asking for :P
  19. S

    Chemistry: Post your doubts here!

    Where is the example :P
  20. S

    Chemistry: Post your doubts here!

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