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    (Original post by KingdomOfTheLord)
    Which one was that? They never asked for a definition?

    No they said explain the purpose of the catalyst in petroleum industry
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    (Original post by barbiex)
    what percentage does f331 count as?? I know f332 is more but does anyone know the actual %
    30

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    (Original post by Jessio)
    Its 90/34 as h2O2 is equal to that (34 is the rfm of h202)
    Yeah but in the equation there was 2 moles og h202 so 2 × 34 = 68
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    How did you get C4H9O it was C4H10O and isomer of ethoxyethane that was given

    Enthalpy change was for one mole so had to half for the value given


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    Btw what did you guys say the use of zeolite was for cracking? I said catalyst
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    (Original post by KingdomOfTheLord)
    Everyone got butan-2-ol for the skeletal right? And C4H9?
    I got C4H10O
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    (Original post by Darcy1)
    Yeah but in the equation there was 2 moles og h202 so 2 × 34 = 68
    The moles youre talking about is the molar ratio of the moles, so the ratio was 2:2:1 hydrogen peroxide, water oxygen respectively
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    (Original post by f.loco)
    Did you get a triangle for skeletal for ethoxyethane like /°\ or something like \/°\/

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    Yep, ^o^ and ether. I have never seen a paper before where they ask you to draw an ether.
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    (Original post by -Gifted-)
    Do you guys feel SiO3 2- will get atleast a mark ?
    Was that not the right answer?
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    (Original post by vuvuzela)
    How did you get C4H9O it was C4H10O and isomer of ethoxyethane that was given

    Enthalpy change was for one mole so had to half for the value given


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    General formula for alcohol is CnH2n+1O

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    (Original post by KingdomOfTheLord)
    Everyone got butan-2-ol for the skeletal right? And C4H9?
    Its C4H10O
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    (Original post by f.loco)
    Yes but C4H9O

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    Wasn't it C4H9OH????


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    What was the definition for bond enthalpy? I put 'the energy required to break one mole of bonds in a molecule'
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    Unofficial mark scheme anyone?
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    (Original post by f.loco)
    Did you get a triangle for skeletal for ethoxyethane like /°\ or something like \/°\/

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    What did you put for the homologous series? I put alkane.
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    (Original post by Jessio)
    The moles youre talking about is the molar ratio of the moles, so the ratio was 2:2:1 hydrogen peroxide, water oxygen respectively
    Yeah exactly so because they wanted you to work out the total volume of the gases which were all the products, 2 moles of peroxide made 3 moles of gas so the ratio was 1 : 1.5
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    (Original post by f.loco)
    General formula for alcohol is CnH2n+1O

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    i thought it was CnH2n+1OH
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    (Original post by Adam971)
    Does aliphatic just mean 'does not contain an arene ring'?
    Yes although a previous mark scheme says does not contain benzene, you should still get the mark
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    (Original post by ZoeWoah)
    i thought it was CnH2n+1OH
    Youre right i fuccked up !!!

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    (Original post by audreygal)
    What did you put for the homologous series? I put alkane.
    ether
 
 
 
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