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    (Original post by Paolat)
    does anyone know what the circled for the radical was it NO or NHO3
    NHO3 is actually HNO3, no?

    It's nitric acid. No way in hell is that a radical.

    The radical was NO.

    Reason: the species has an unpaired electron, hence it is a radical
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    Thank god I wrote carboxylic acid I nearly changed it to aldehyde.
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    (Original post by kironkabir)
    NHO3 is actually HNO3, no?

    It's nitric acid. No way in hell is that a radical.

    The radical was NO.

    Reason: the species has an unpaired electron, hence it is a radical
    yh thats what i meant
    Woo thats 1 mark in the bag LOL..
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    (Original post by Paolat)
    does anyone know what the circled for the radical was it NO or NHO3
    I got NO aswell

    For the other part of the question, when two radicals combined, did anyone get 'termination'?
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    (Original post by Paolat)
    Lol same here.. as soon as i heard what everyone else got for the questions ive been really nervous i wrote aldehyde instead of carbocyllic acid and i got the PPM questions wrongg But i think gradeboundries will be something like 74/100 for an A :confused:
    I think it will be about that, it was the same difficulty as the jan 10 paper, and that was 74/100 for an A. however, it might go down , but not by much
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    What did you get for the percentage yeild.. well you made to work out of the mass or butan 1 ol using 5g of 1 bromo something.. sorry cant exactly remember!
    Did anyone get 2.70g?
    I have lost so many marks :/
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    (Original post by mattmitch22)
    I got NO aswell

    For the other part of the question, when two radicals combined, did anyone get 'termination'?
    Yep ... I think LOL
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    (Original post by FayeFayeFaye)
    What did you get for the percentage yeild.. well you made to work out of the mass or butan 1 ol using 5g of 1 bromo something.. sorry cant exactly remember!
    Did anyone get 2.70g?
    I have lost so many marks :/
    HUH i did not see this question LOOL Are you doing OCR A or salters B

    :confused: :confused: I hope i didnt miss this question
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    Dropping 5 marks is not bad at all. Also what the hell was the answer the the structural isomerism question - i know i got that wrong. . .
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    Was it aldehyde or carboxylic acid??

    It never stated how far the oxidation had gone.
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    It was in this exam Pao.

    It's just 5/Mr of the bromo whatever * Mr of butane whatever. I got 4 ish I think. For the second part I got 8.9

    I put aldehyde. I'm fairly sure that'll get you a mark.
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    (Original post by Paolat)
    HUH i did not see this question LOOL Are you doing OCR A or salters B

    :confused: :confused: I hope i didnt miss this question
    OCR salters B
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    (Original post by Paolat)
    HUH i did not see this question LOOL Are you doing OCR A or salters B

    :confused: :confused: I hope i didnt miss this question

    I got 2.7 g for the 100% yield of bromobutane.

    Did you get 6 for the next question?
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    (Original post by FayeFayeFaye)
    What did you get for the percentage yeild.. well you made to work out of the mass or butan 1 ol using 5g of 1 bromo something.. sorry cant exactly remember!
    Did anyone get 2.70g?
    I have lost so many marks :/
    I got 2.70 for that part and 6 for the next i think :-/
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    i woked out the first part by:

    5/136.9 = x/74

    0.0037 x 74 = X

    X= 2.7
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    (Original post by JamesPen)
    Was it aldehyde or carboxylic acid??

    It never stated how far the oxidation had gone.
    It was under reflux, so i put carboxyllic acid
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    I think this paper was average but hearing around i think that the grad boundaries will be similar to last years.
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    Hello everyone!
    So how'd it all go?
    Did the thread help in anyway?
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    (Original post by JamesPen)
    I got 2.7 g for the 100% yield of bromobutane.

    Did you get 6 for the next question?
    That's what I got mate
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    The last equation I got that Venus's Nitroggen was 4.06 I think times greater than the Earth's.

    Earth

    1 atm x 78% = 78

    Venus

    91 atm x 3.5% = 318.5

    318.5/78 = 4.056

    = 4.06 times greater.

    But I haven't got a clue if it's right. Thought the wording of the questions was pretty crap, I didn't really know what they wanted!
 
 
 
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