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    (Original post by ak983)
    Yeah that's right but I forgot to draw the other electrons, do you know how many marks the question was?
    It was either 2 or 3 but i cant see how you would get three marks for that so probably 2..
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    (Original post by mani119)
    Yes thank you, thats exactly what i wrote, I also stated that zinc is oppositely attracted to the negative electrode and gains an electron and is reduced. Will i get full marks?
    That would be 3/4 as zinc would gain 2 electrons, not 1. But they might allow it for 4 anyway


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    (Original post by micycle)
    I'm pretty sure the question was why aren't lower pressures used, and not higher.
    I circled 200 pressures and stated that the pressure isn't lower because this would decrease the yield???
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    (Original post by Radical Lemon)
    Does anyone know the calculation for the bond energy question?
    I remember it was something like:

    x + x = 2H(2)0
    x + x = 464 x 4 = 1852

    is this right and does anyone know the equation?
    read back pages, its -486kJ
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    (Original post by Kirankhalsa)
    I circled 200 pressures and stated that the pressure isn't lower because this would decrease the yield???
    I think that I circled 400 pressures because that question was asking for the pressure that returned the most percentage yield.
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    (Original post by Kirankhalsa)
    I circled 200 pressures and stated that the pressure isn't lower because this would decrease the yield???
    It was 400 atmospheres, but your second answer was correct


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    (Original post by alloysius)
    Mani it was Zinc i believe and Physics should be easier.
    Woa Chemistry was easy but i made silly mistakes
    Btw is this anyone from St aloysius :confused:
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    god bless i circled 400 atmospheres by looking at the next question and it said "200 atmospheres used in haber process" so i thought it was too easy, then just looked at the graph
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    (Original post by hannah4262)
    On C3 what did you get for the questions with the graph about ammonia production? I think I said that lower temperatures aren't used because that would increase the backwards reaction. For the one where you had to circle a number I circled the highest and said that higher pressures aren't used because it would be too expensive. Does anyone know if these are right?
    Lower temperatures favour the forwards reaction however when it's too low the rate of reaction is too low.

    And I'm pressure sure your pressure answer is correct.
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    Can someone tell me if the 'structure of a metal' question at the end of the exam was the only one on that page? I missed that page and I need to know whether I missed more than one question [chemistry c2]
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    (Original post by jjsnyder)
    That would be 3/4 as zinc would gain 2 electrons, not 1. But they might allow it for 4 anyway


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    Ah ok thks im not sure if i wrote 2 or 1
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    i didnt write 2tonnes, for the relative atomic mass question, but i had my method spot on, i showed the balanced 2mg0, 24x2 and 16x2 showing 80, diving the 80 by 48, will i still get the 2/3marks...
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    ffs, thought the zinc chloride was in solution, so I put hydrogen that's a lesson that I should always read the question :sad:
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    for the first question of c3 was it how water was distilled ?, i didn't see the part where it said write two main points, for my answer i said it was heated and then condensed ( like fractional distillation) then i said carbon and chlorine are added chlorine killing bacteria and carbon removing chlorine, how many marks would that get?
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    (Original post by zorbaner)
    Can someone tell me if the 'structure of a metal' question at the end of the exam was the only one on that page? I missed that page and I need to know whether I missed more than one question [chemistry c2]
    I think there was one on drawing the bonds of O2 aswell?
    Worth 2 marks i think
    It was free marks
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    I put down for the two stages of treating water as adding fluorine and adding chlorine and i explained both would that be only 2 marks or would it get me the 4 marks
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    (Original post by zorbaner)
    Can someone tell me if the 'structure of a metal' question at the end of the exam was the only one on that page? I missed that page and I need to know whether I missed more than one question [chemistry c2]
    There was one about the bonding in oxygen as well
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    (Original post by Ankit1881)
    I put down for the two stages of treating water as adding fluorine and adding chlorine and i explained both would that be only 2 marks or would it get me the 4 marks
    Probably 3 max, but most likely 2 as you had to say and describe filtration


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    plzz someone answer my question
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    What did everyone put for that question about how u know that high temperatures are used? And it showed an equation?
 
 
 

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