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  1. moonlight22

    chemistrey paper 11 stainless steel alloy question

    If u mean the brass alloy I chose that zinc dissolves in hydrochloric acid "C" as copper doesn`t react and brass is made up of Cu and Zn
  2. moonlight22

    Chemistry paper 12 discussion!!!!!!!!!!

    what was the question again
  3. moonlight22

    chemistry paper 11 may 2011

    soo easy, and i`m sure paper 3 is gonna b so damn hard
  4. moonlight22

    Chemistey Doubts

    hey do I have to know how to calculate the limiting reagents ? this is in the chemical reactions chapter
  5. moonlight22

    All chemistry Doubts here :)

    come on no 1 can answer this ?? :D :lol:
  6. moonlight22

    All chemistry Doubts here :)

    Electrochemical simple cell: reactions: copper-->positive electrode zinc-->negative electrode electrolye: sulfuric acid zinc----> zinc ion copper---> hydrogen ions from acid reacts with it and gains electron and becomes a hydrogen gas question: why copper electrode doesn`t loose electrons...
  7. moonlight22

    Chemistry Paper 1 Doubts Here... !

    Q.P--> http://www.xtremepapers.me/CIE/Cambridg ... _qp_12.pdf M.S--> http://www.xtremepapers.me/CIE/Cambridg ... _ms_12.pdf Question 8 answer: "A" silver is a reactive metal ! how ? isn`t silver under copper in the reactivity series ?? why not "B" !!!!!!! OMG IT`S SOOOOOO TRICKY MAAAAN
  8. moonlight22

    All chemistry Doubts here :)

    Q.P--> http://www.xtremepapers.me/CIE/Cambridg ... _qp_12.pdf M.S--> http://www.xtremepapers.me/CIE/Cambridg ... _ms_12.pdf Question 8 answer: "A" silver is a reactive metal ! how ? isn`t silver under copper in the reactivity series ?? why not "B" !!!!!!! OMG IT`S SOOOOOO TRICKY MAAAAN
  9. moonlight22

    CHEM PP3! HELP!

    Haber process: as the temperature increases, this favours endothermic / reverse reaction , so the rate of yeast produced decreases as the temperature decreases, this favours exothermic / forward reaction, so the rate of yeast produced increases so 450 celsius is the optimum temperature :)...
  10. moonlight22

    CHEM PP3! HELP!

    BTW no pressure is used for the contact process, it`s under atmospheric pressure as sulphuric acid is at 96% haber process: 1-powederd iron catalyst because it increses the surface area and catalysis the reaction 2-temp. 450: high enough for economical reaction and low enough for a reasonable...
  11. moonlight22

    igcse biology study guide upload!!!!!!!!!!!!!

    but what`s the difference between a studyguide and a book ? and y everyone prefers a studyguide ?
  12. moonlight22

    Arabic as first language

    coool what the name of the book in order 2 buy it :) ?
  13. moonlight22

    Arabic as first language

    loool noooo but i`m worried they might bring grammer
  14. moonlight22

    Which textbook you use for chemistry...

    ouhhhhh sorry i thaught u were talking about the study guide :P
  15. moonlight22

    Which textbook you use for chemistry...

    at the beginning of each chapter you`ll find the key objectives then scan through the topic until you find that point the only chapter which isn`t in this book is the carbon cycle :(
  16. moonlight22

    Which textbook you use for chemistry...

    yes all of these are in the key objectives :) check again
  17. moonlight22

    IGCSE CHEMISTRY STUDY GUIDE UPLOAD

    http://www.amazon.com/IGCSE-Study-Guide ... 0719579023 go to this website and click on "look inside" you`ll find the 1st chapter sorry this is the only way I could help u but atleast u have the 1st chapter :)
  18. moonlight22

    IGCSE CHEMISTRY STUDY GUIDE UPLOAD

    I don`t have a scanner , if i had 1 I would b pleased 2 upload it BTW i baught the book in Qatar so ofcource they`d sell it in Bahrain at Jarir`s bookstore
  19. moonlight22

    Arabic as first language

    is grammer included ?
  20. moonlight22

    Which textbook you use for chemistry...

    I wish if I could, but I don`t have a scanner
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