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  1. Mahnoorfatima

    Biology; Chemistry; Physics: Post your doubts here!

    http://papers.xtremepapers.com/CIE/Cambridge%20International%20O%20Level/Chemistry%20(5070)/5070_s07_qp_4.pdf Question 8 part L. Why are we taking the Mr of CxHy as 14? When are we supposed to do that?
  2. Mahnoorfatima

    Biology; Chemistry; Physics: Post your doubts here!

    Reply to my question as well . Please! There are contradictory answers! Im confused!
  3. Mahnoorfatima

    Biology; Chemistry; Physics: Post your doubts here!

    GUESS!!!?? You're not sureeee? :( Isn't there any proper method behind it? ANYONE!??
  4. Mahnoorfatima

    Biology; Chemistry; Physics: Post your doubts here!

    LOL what are you talking about???
  5. Mahnoorfatima

    Biology; Chemistry; Physics: Post your doubts here!

    When am I supposed to do that!!!??
  6. Mahnoorfatima

    Biology; Chemistry; Physics: Post your doubts here!

  7. Mahnoorfatima

    Biology; Chemistry; Physics: Post your doubts here!

    Whaaaaat? Check out Question 8 part L .Why are we taking the MR as 14 then? http://papers.xtremepapers.com/CIE/Cambridge%20International%20O%20Level/Chemistry%20(5070)/5070_s07_qp_4.pdf
  8. Mahnoorfatima

    Biology; Chemistry; Physics: Post your doubts here!

    By the way when we're calculating that CxHy thing , we will always consider H diatomic. ? The Mr has to be 14 in total? Always???
  9. Mahnoorfatima

    Biology; Chemistry; Physics: Post your doubts here!

    WHYYYY FOURTEEEEN!! WHY NOT 13! THE MR OF CH is 13 NO??? :'(
  10. Mahnoorfatima

    Biology; Chemistry; Physics: Post your doubts here!

    But what if the H isn't 2? Sorry but I need to get this!:/
  11. Mahnoorfatima

    Biology; Chemistry; Physics: Post your doubts here!

    Look. First you should know that while drawing an ester you need to remove OH from carboxylic acid and H from OH group of Alcohol. Second, Draw the Acid and then the alcohol BUT first make the mirror image of alcohol. Like if you have e.g. C-C-O (this is the alcohol having H's and removed H) So...
  12. Mahnoorfatima

    Biology; Chemistry; Physics: Post your doubts here!

    14? o.O Why is it always 14? Does it always have to be 14?
  13. Mahnoorfatima

    Biology; Chemistry; Physics: Post your doubts here!

    Question 8 part L!
  14. Mahnoorfatima

    Biology; Chemistry; Physics: Post your doubts here!

    SOMEBODY ANSWER MY QUESTION! :mad::mad::mad::mad:
  15. Mahnoorfatima

    Biology; Chemistry; Physics: Post your doubts here!

    http://papers.xtremepapers.com/CIE/Cambridge%20International%20O%20Level/Chemistry%20(5070)/5070_s07_qp_4.pdf Question 8 part L anyone? I seriously dont get this kind of crap. :/
  16. Mahnoorfatima

    Biology; Chemistry; Physics: Post your doubts here!

    Why can't it be c? :/
  17. Mahnoorfatima

    Biology; Chemistry; Physics: Post your doubts here!

    Question 5 anyone?????????????? http://papers.xtremepapers.com/CIE/Cambridge%20International%20O%20Level/Chemistry%20(5070)/5070_w05_qp_4.pdf
  18. Mahnoorfatima

    Biology; Chemistry; Physics: Post your doubts here!

  19. Mahnoorfatima

    Biology; Chemistry; Physics: Post your doubts here!

    Can we write that the blue solution fades in the observations for the reaction b/w Zn and copper II sulfate ?
  20. Mahnoorfatima

    Biology; Chemistry; Physics: Post your doubts here!

    Oh LOL! I posted the wrong question. -_- I was asking about the last part of the paper the concentration of sodium thiosulfate in the 1st expt.
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