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  1. SuperXDE

    WHO CAN SOLVE THIS MOLE question???

    Wa Eyakoum , The Question is based on three points , Mole = Concentration × Volume , Mole = Mass / Relative Mass (Either Molecular or Atomic ) and Ratio between Reactants. o.O I didn't see you online for a while. It is Water of Crystallisation , Water of Neutralisation is the product of...
  2. SuperXDE

    WHO CAN SOLVE THIS MOLE question???

    There is a missing element yet in the Question , How much water was the 27.823g sample dissolved in? Well , supposing that it is 1000cm3 , It is the answer Math_Angel worked out. however the volume of the solute is required . But I tried to solve it with my hand ... it appears that something is...
  3. SuperXDE

    Please help....Fractional Distillation

    Jazaana Wa Eyakoum , Anyone .. Anything Hesitate not , to ask.
  4. SuperXDE

    HELP IN MATH PLZ!!!

    That is when Pythagoras Theorem is used , x2-x1 would give you the Horizontal Part length , y2-y1 The vertical part , and apply Pythagoras to find the Hypotenuse which is the length of AB
  5. SuperXDE

    Please help....Fractional Distillation

    Jazaana Wa Eyakoum Fractional Distillation of Crude Oil .... ¬¬ okay... I will try Crude oil is a mixture of organic substances , each substance differs from the other in physical change points , it is heated to 400C , to make sure all the substances are Liquid , then the substances with...
  6. SuperXDE

    HELP IN MATH PLZ!!!

    It would be a better idea if we combine all IGCSE , CIE and Edexcel forums in one.
  7. SuperXDE

    Dr. Roger Norris - EXAMINERS' TIPS

    Ah , here is the PDF version of it
  8. SuperXDE

    Dr. Roger Norris - EXAMINERS' TIPS

    Wa Eyakoum , Brother/Sister , Inshaa'Allah we all score good. :)
  9. SuperXDE

    MAJOR DOUBT IN CHEM

    The process of fusion is when Hydrogen atoms are fused together to produce helium , it produces to much energy ( the sun ) ... I believe it was in our Physics Syllabus As for the Question mentioned , May 2004 Q4ii I think the answer would be like this Pb(NO3)2 + 2 NaCl --> PbCl2 + 2NaNO3 As...
  10. SuperXDE

    Please help....Fractional Distillation

    Wa Alikum Assalam Wa Rahmatullahi Wa Barakatuh , Fractional distillation is the Separation of a mixture of miscible substances , the best example for Fractional Distillation would be that of water and Ethanol it is a famous one Click here for the image , it will appear BLACK over here , PNG...
  11. SuperXDE

    MAJOR DOUBT IN CHEM

    Wa Alikum Assalamu Wa Rahmatullahi Wa Barakatuh , May Peace , Mercy and Blessings of Allah ( refer to my signature if you don't know what Allah means ) be upon you :) Carbon Dioxide ( CO2 ) is removed by Photosynthesis , Vegetation and by dissolution in Oceans. As for Question 2 , Math Angel...
  12. SuperXDE

    Dr. Roger Norris - EXAMINERS' TIPS

    Oh , Many thanks , Jazaak Allahu Khairan , May Allah ( For more info about Allah , refer to my signature ) reward you with all what is good ( That is a bad translation by me for Jazaak Allahu Khairan -_-" ) :)
  13. SuperXDE

    Chemistry Excess reactions

    I didn't start answering past papers yet , only reading till a "further notice" , Well... I made a self check yesterday on the same question paper ( 2nd Variant ) ¬¬ , I think it is related to the ratio in Carbon Dioxide , just calculate how much volume does carbon occupy of butane and how much...
  14. SuperXDE

    Help in bio P1 june 2008

    I don't take Biology , but ... if energy is released , there is a percentage that is lost ... as heat?
  15. SuperXDE

    chemistry

    Check this , Page 177 , Hope it helps.
  16. SuperXDE

    Chemistry Revision

    Wa Alikum Assalam Wa Rahmatullahi wa Barakatuh Jazaak(i) Allahu Khairan for your concern , ^^ But it is already in the main post..
  17. SuperXDE

    Chemistry Paper 3

    Jazaak(i) Allahu Khairan , this is really helpful :)
  18. SuperXDE

    chemisrty

    Inshaa'Allah ( If Allah wills ... for those who don't understand what is meant by Allah , please refer to my signature ) You'd all score an A* , But it would be better if you don't accuse each other on the forums , Use PMs instead and notify each other about the statement mistakes in the topic...
  19. SuperXDE

    help with paper 2 accounting

    If you have enough time , Read the book in a quick manner , while focusing on the main points , and answer past papers , mark the parts you are bad at , and Read them again.
  20. SuperXDE

    Chemistry Paper 3

    Okay , I didn't understand what you meant... But I just read it somewhere a while ago. that it is because of free electrons , like in Metallic Bonding , Positive ions and Electrons moving all around the ions , That is why it is Conducting , but in Covalent Bonding they are sharing electrons...
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