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OCR Chemistry F322~ 4th June 2013~ AS Chemistry Watch

  • View Poll Results: How did you find the exam
    Hard A= 72
    42
    15.22%
    It was okay A= 76
    99
    35.87%
    Easy A= 79
    75
    27.17%
    Very Easy A=82
    60
    21.74%

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    What the **** was the biodegradable propellant?
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    (Original post by walkers38)
    I was thinking of that but then it has + in between boxes. So I just put H2O in the other box :mad:
    thats wrong because the oh is removed and it forms a double bond which can go on to two different carbons thats why there were two boxes
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    (Original post by Dizzie31)
    yeah it was only one mark , i'm pretty sure that'd be just fine
    My diagram extended the whole page. Such a long molecule.
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    For the octagon i did the dispayed formula of the cyclic octane. Is that ok
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    (Original post by dawg)
    1130g/the mr = 210

    (210/220)*100 = 95.45
    It was 11.13 kg and you times it by a thousand to get 11130g
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    (Original post by daisyrchds)
    yeah
    So why was the last bit worth 3 marks? You didn't have to divide by 1000 again did you?


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    (Original post by Saif95)
    Looks like Im the only one who found it hard/ messed it up
    I din't think it was easy and also messed up a few times .
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    (Original post by Farringtonn)
    For the branched ten chain alkene would it be ok if I did two beaches I did 2,3-dimethyloctane?


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    I think so, I put that.

    (Original post by Dizzie31)
    There was 2 moles already in the original equation, not 1.
    10/2 = 5
    so you times it by 5.
    please be wrong lol
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    (Original post by walkers38)
    My diagram extended the whole page. Such a long molecule.
    LOl i drew mine small purposely
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    (Original post by Saif95)
    Looks like Im the only one who found it hard/ messed it up
    dont be silly! out of the thousands of people who took this exam, you only know how a few class mates feel or people on the tsr. chin up
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    Was the formation positive or negative !??


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    I added the enthalpy change to the activation energy, surely both those would be added? hmm.
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    (Original post by massi1296)
    theres different ways to get it but im sure it was 1640

    I would bet you my house that its 820 ahahah
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    whats the general verdict?
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    (Original post by irfymahmood)
    thats wrong because the oh is removed and it forms a double bond which can go on to two different carbons thats why there were two boxes
    I shouldn't have ignored what the question said 'draw the organic products'. Hmph.
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    I put s8 and then also S4+ for the question below

    Also infrared spec question when it said about its real world application I put Breathilisers to check alchohol levels?
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    (Original post by jacksonmeg)
    seems like nobody knows what a 9 c chain is
    its nonane
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    for the sulfur question, did you have to put S8+ and S4+ ?
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    (Original post by WillGC)
    For the octagon i did the dispayed formula of the cyclic octane. Is that ok
    If it just asked for the structure then you should be fine
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    (Original post by theCreator)
    I would bet you my house that its 820 ahahah
    aha i'm going with this guy! i'd bet my life
 
 
 
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