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    (Original post by romansholiday)
    I said for the two conditions for cracking as:

    mixed with steam
    high temps

    Would I get 2 marks?
    I think so because that is the other method


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    I Smashed the exam!!!

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    I reckon the boundaries will be pretty high, that paper seemed quite easy to me

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    (Original post by Zeeyo)
    it was pressure not catalyst
    I'm pretty sure it's not pressure
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    (Original post by romansholiday)
    I did this too, like I wrote Fe with a little 2 on the end and balanced from there, wtf

    http://www.webqc.org/balance.php?rea...3D+Fe2+%2B+CO2 This website says that the balanced equation is 2 Fe2O3 + 3 C = 2 Fe2 + 3 CO2
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    (Original post by Cakes717)
    At the lowest I've got 52/60. What grade do you think that is?
    A*. Definite.
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    Does any one have any suggestions for the grade boundaries ?
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    (Original post by LiamCollins)
    For the advantage of ethene and steam can I say that it produces pure ethene so less is needed to be produced?
    No, ethene is hydrated with steam to produce ethanol. However this is impure and needs to be distilled to remove the impurities
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    Anyone think it was hard?
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    Would mentioning that you can make margarine and having a longer shelf life be two marks for the last question?
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    (Original post by srmed)
    Was the two conditions for cracking: high temperature and hot catalyst


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    (Original post by FitzpatrickR)
    Yh thats right
    For the two conditions I think I may have over explained???? I stated the two methods that can be used. This is mentioned in the AQA Revision guide aswell.

    This was my answer:

    1 - Passing hot hydrocarbon vapours over a hot catalyst
    2 - Reacting hydrocarbon vapours with steam at a high temperature (approx 800C)

    Would I get the marks???
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    (Original post by ScienceFantatic)
    Question 1

    ( +1), electrons( -1), neutron is uncharged( 3 marks)- not sure if it was in the nucleus or just the atom overall
    It was just the nucleus, because it said about part 'Z', and that's all it wanted, not the whole atom. The way you have written the answer doesn't make it very clear though, it should be something like this

    Protons (+1)
    Neutrons (0)
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    (Original post by TheDragonGuy)
    It was just the nucleus, because it said about part 'Z', and that's all it wanted, not the whole atom. The way you have written the answer doesn't make it very clear though, it should be something like this

    Protons (+1)
    Neutrons (0)
    I said protons have +1 charge and neutrons are netural and thus have zero charge. I then stated the relative masses (proton and neutron both have relative mass of 1). I also included about the electrons e.g. -1 charge, but I clearly mentioned that the electrons are not in Z (the nucleus) labelled in Figure 1.
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    (Original post by TheKillingTorch)
    A*. Definite.
    Woo🤗
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    What are we thinking 33/34? Grade wise
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    (Original post by Mlb37)
    I reckon the boundaries will be pretty high, that paper seemed quite easy to me

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    yes probably 55/60 for an A*
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    (Original post by Nathan Emmings)
    What are we thinking 33/34? Grade wise
    B

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    (Original post by guy321)
    For the two conditions I think I may have over explained???? I stated the two methods that can be used. This is mentioned in the AQA Revision guide aswell.

    This was my answer:

    1 - Passing hot hydrocarbon vapours over a hot catalyst
    2 - Reacting hydrocarbon vapours with steam at a high temperature (approx 800C)

    Would I get the marks???
    Of course! !!!

    I said
    -catalyst
    -high temperature or something vapours I think.

    I think I'll get 1

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    Did anyone know the black substance???
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    2 questions
    what would 49/50 be
    is saying that margarine can be made and it has a longer shelf life correct for the last 5 marker (I explained hydrogenation correctly)
 
 
 
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