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  1. M

    Chemistry MCQ thread...

    I keep forgetting CO2C is ester =/ ...anyhow thanks. Can you please help explain the other two you posted, which both have the answer B.. I totally don't get how it be 3 moles of HBr wouldn't it just take 2 moles? and damn the solubility ones was soo annoying.
  2. M

    Chemistry MCQ thread...

    Also..
  3. M

    Chemistry MCQ thread...

    can you PLEASE explain why they boht are B...
  4. M

    Chemistry MCQ thread...

    I think the ans of the two above me as D and the next one is C. hope i'm right, best of luck everyone.
  5. M

    Maths S1 M/J10 Solve please

    God I have no idea what "9P3" is, I don't think I have ever even done that on a calculator yet.. can someone please explain the difference between 9P3 and 9C3, because It think im going to do really really poorly in the exam 2morrow.
  6. M

    permutation queston

    I don't get it how are there 5 ways we can put those 2 in the 4 people ... if we have 4 people = :D and two people who don't want to sit together :evil: then :evil: :D :evil: :D :D :D :D :D :evil: :D :evil: :D :D :D :D :D :evil: :D :evil: :D :D :D :D :D :evil: :D...
  7. M

    Chemistry P34. What i know

    does that mean that we 'have' to give 23.45 instead of 23.47, or in this case give 23.50?
  8. M

    chemistry paper 34 preparations...

    does that mean that we 'have' to give 23.45 instead of 23.47, or in this case give 23.50?
  9. M

    Chemistry P34. What i know

    Thank you Jafar. I have heard something NaSO4 or NaCO3 is coming in a question about enthalpy change. I wonder if someone can find a good question similar to that in the past papers.
  10. M

    chemistry mcq ans wrong?

    oh right thanks again, I forgot that totally,....... they should really write those things in the data booklet learning them is going to be a pain. can't believe i forgot it since i gave olevels. I keep getting stuck in mcqs =/ getting really annoying....now I'm on mcq 16 from the same paper...
  11. M

    chemistry mcq ans wrong?

    Oh right thank you I understand it now. 'provide E to break, get E when make' heh, that rhymes. Is there a chance you could also help me out with mcq no.14 from the same paper, I don't understand how to reach the answer and what knowledge i require to solve similar questions in the future...
  12. M

    chemistry mcq ans wrong?

    the mcq is from 9701_s10_qp_11 question 4, the MS and ER say the ans is C, isn't it D?
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