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  1. Catherine_1

    Physics: Post your doubts here!

    Hey, Could anyone please help me out with the following doubt?:) In this graph of X-ray spectrum, how is it possible for the photon to have maximum energy and yet zero relative intensity?:/ Since Intensity=Power/Area==>Energy/Area*Time? Thanks.:)
  2. Catherine_1

    Chemistry: Post your doubts here!

    Yeah you are right that the CH is attached to CHO, I have just denoted it in that way though it isn't exactly appropriate :p, I should have shown it simply as R-CH3 since it is only attached to CH but I wrote the CHO part to indicate is the branched CH3 and not the first one, or lol it could...
  3. Catherine_1

    Chemistry: Post your doubts here!

    You're welcome!:) Okay so you've mostly done it right :) , just a few things: Q = CH3CH2CH(CH3)CHO 1. R-CHO 2. R-CH3-CHO(This one won't be CH carbon, rather CH3) 3. R-CH(CH3)-R' 4. R-CH2-CH(Not CH3) 5. R-CH3 P = CH3CH2CH2CH2CHO 1. R-CHO 2.R-CH2-CHO 3.R-CH2-CH3 4. R-CH3 5. I'm not sure of which...
  4. Catherine_1

    Chemistry: Post your doubts here!

    I will explain for R and then I guess you can go about the others.:) Okay, so for R the compound is CH3CH2(CH3)CH2CHO Now for determining the absorption in nmr we have to check the environment on both sides left and right. 1.One would be R-CHO 2.Second would be R-CH2-CHO 3.Third one would be...
  5. Catherine_1

    A2 Physics October November 2015 Papers

    Oh, thank you so much!:) God Bless.:)
  6. Catherine_1

    A2 Physics October November 2015 Papers

    Which thread is the marking scheme in? Thank you. :)
  7. Catherine_1

    Chemistry: Post your doubts here!

    Thank you so much!:)
  8. Catherine_1

    Chemistry: Post your doubts here!

    How to prepare for paper 5?Any good sites?
  9. Catherine_1

    Chemistry: Post your doubts here!

    Hey can anyone please help me with this graph-: This is the marking scheme 9701_s12_qp_51 Thank you!:)
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