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    (Original post by Eternal Rest)
    I got an aldehyde with an Mr of 86.

    I also saw it could be a ketone aswell, but I stuck with the aldehyde. I think it was like pentanal or something.

    For the stereoisomer definition, I put they have the same structural formula but a different arrangement of atoms in space.
    yeah i also got Pentanal, with an Mr of 86

    :O I had to improvise on that defintion, i just put anything down
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    (Original post by otrivine)
    how baout planes and cars? cause they are used everyday ?
    Do cars emmit CFC'S? and I thought planes only emitted Nitrogen oxides?

    your probably right im not too sure
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    What did you have to write down for the explanation of Boltzmann ?
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    (Original post by dee11)
    yeah i also got Pentanal, with an Mr of 86

    :O I had to improvise on that defintion, i just put anything down
    i got the same but got a ketone and penta-2-none is that acceptable cause it added to 86?
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    I have to say I'm very interested to see what the grade boundaries are gonna be like for this. I only need a B, but think I should have got an A in that paper based on the standard 80% for an A kind of boundaries. I dont know how high they'd actually make it...
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    (Original post by asif123)
    Overall a very generous paper but I have a strong suspicion that the grade boundaries will be sky high...something like 80-85+ for an A. A couple of iffy questions like the catalyst one...I know catalyst doesn't affect the equilibrium but wouldn't it slow down the reverse reaction if there was no catalyst as a catalyst speeds up both forward and reverse reactions equally. Did anyone get propanal/C5H10O for the one where you had to analyse I.R and come up with a structure and for the CFC's no presence of a C-H bond....oh and that CFC's are non toxic as you are able to inhale them blah blah...Let me know if anyone got any similar answers please..haha
    yeah, I got all of those! I put down for that equilibrium ques that the revese reaction would be slower although it would still be the same rate as the foward reaction

    when you say for the CFC'S one, dont you mean no presence of an 0-H bond?
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    I swear the bond angle is the same as in an alkene, I.e 120
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    i hope the grade boundaries won't be too high... the paper wasnt very hard but it was an easy one to make silly mistakes in
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    What were the termination steps
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    (Original post by dee11)
    I totally forgot the definition for sterioisomers

    what did people get for identifying compond J using the infared spectum ques?
    I got a ketone
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    (Original post by maryam.asmari)
    Yuuppp! Got the same.
    Was literally the last thing I wrote down. "Put your pens down" BOOM 94
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    Cl + Cl ---> Cl2

    Cl + H ---> HCl

    At least that's what I put, dunno if it's right.
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    (Original post by otrivine)
    i got the same but got a ketone and penta-2-none is that acceptable cause it added to 86?
    think there could have been two answers then?
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    (Original post by holahola)
    What were the termination steps
    Cl radical + Cl radial = Cl2 and
    and H radical + H radical = h2
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    (Original post by Eternal Rest)
    Cl + Cl ---> Cl2

    Cl + H ---> HCl

    At least that's what I put, dunno if it's right.
    thats what i put
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    (Original post by dee11)
    think there could have been two answers then?
    for the normal distribution i said more collisions and have energy greater than Ea then drawed that graph ?
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    (Original post by sam06)
    I got a ketone
    really, I got and Aldehyde - pentanal
    not sure what the right answer is now, there seems to be mixed views on that one
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    (Original post by otrivine)
    for the normal distribution i said more collisions and have energy greater than Ea then drawed that graph ?
    more collisions? wasnt the question asking for what would happen if the temperature decreased?
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    (Original post by dee11)
    more collisions? wasnt the question asking for what would happen if the temperature decreased?
    ?
    what did u write? was the graph the same as our books? high temp and low temp
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    that electrophilic reaction question with the cyclic hydrocarbon at the end was quite tricky, i spent some time on it
 
 
 

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