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AQA GCSE Chemistry - C2 and C3 15th May watch

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    Does anyone have any idea if you can write your answers in standard form on the physics exam?
    For example if I worked out an equation like 1/2x1200x5000^2 and the answer was 1.5x10^10J could I leave it at that, or is converting the answer to an ordinary number required?
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    (Original post by CurleysWife)
    Does anyone have any idea if you can write your answers in standard form on the physics exam?
    For example if I worked out an equation like 1/2x1200x5000^2 and the answer was 1.5x10^10J could I leave it at that, or is converting the answer to an ordinary number required?
    If it says kJ then you have to use kJ.

    If not, then it should be allowed.

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    What did people put for the six marker on the unit 3????!! it wasnt what i was expecting
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    (Original post by elizabethn)
    What did people put for the six marker on the unit 3????!! it wasnt what i was expecting
    just how you carry out calorimetry basically: weighing the fuel and water and temperature before the experiment, heating the water and then weighing them again. i also added a couple of lines on repeating the experiment and taking average readings in the hope that it would get me a mark or two~


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    (Original post by MATHSPOW!!)
    Dying for A* overall but ****ed up so bad.. Like I need the boundaries to be like 39 for A*... Please !
    I have the same problem, but I messed up chemistry instead. :/ Like, I overcomplicated the questions so much...it annoyed me because I know for a fact I can get A*s, I just messed up on the day.

    Maybe you'll get enough method marks for an A*. Even if you don't get it "right" but still put relevant info (like on the higher) markers, they'll probably award marks. We'll just have to see on the day. Also, we have core to go yet! (well, I do.) you could well average an A*, especially if you have a good ISA grade.
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    (Original post by tanyapotter)
    oh, sorry!! really? because hopefully they'll apply it to that damned question on magnesium ions in the B2 paper


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    Well if you talk about the wrong structure in a substance (like diamond) then they usually allow 1 mark for it, so I'm praying they allow me one for saying hydrogen haha. Oh god yes I know how awful was the biology paper, I felt so screwed over by aqa, it hardly involved any actual 'science'
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    For the dot and cross diagram, I did all crosses.... But I don't think it specified what to use, will I still get full marks ?
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    The B2 paper was unimaginably not what anyone expected! Hopefully the grade boundaries will be lower and therefore, we can hopefully get A* overall!
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    What did you put for why silver was used in the filter, i said to kill bacteria in it?

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    (Original post by tomroberts12)
    What did you put for why silver was used in the filter, i said to kill bacteria in it?

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    Yup, prevents the growth of bacteria and also kills them.
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    (Original post by majmuh24)
    Yep same, takes a lot of energy to evaporate the water which costs money.

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    How many marks was this question?
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    (Original post by S.Ahmad)
    Yup, prevents the growth of bacteria and also kills them.
    In the filter or water?

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    (Original post by tomroberts12)
    In the filter or water?

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    Both
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    (Original post by majmuh24)
    Yep same, takes a lot of energy to evaporate the water which costs money.

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    So wait, what was the question and what was the answer?


    ...? I said that it costs a lot of money as it needs lots of energy
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    Guys please what was the question about distillation - advantage or disadvantage?
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    (Original post by zali249)
    Guys please what was the question about distillation - advantage or disadvantage?
    There was no advantage to it, the disadvantage was: distillation requires a lot of energy hence money
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    (Original post by tomroberts12)
    There was no advantage to it, the disadvantage was: distillation requires a lot of energy hence money
    Also there are many steps for Distillation, therefore its expensive as well, such as heating.
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    (Original post by zali249)
    Guys please what was the question about distillation - advantage or disadvantage?
    It was just generally that distillation is expensive- I suppose that you would both go into how the process how the process has many steps and also that large amounts of water would need to be distilled- using a lot of energy.
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    (Original post by xoflower)
    So wait, what was the question and what was the answer?...? I said that it costs a lot of money as it needs lots of energy
    Question - Why is distillation not good in economic terms? (or something like that)

    Answer - Lots of money as lots of energy required to evaporate water, lots of steps (recondensing etc)
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    Any predictions for the grade boundaries for C2? For A* and 100UMS?
 
 
 

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