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    (Original post by Silverland)
    Rg is awful. You can spend hours on it and still struggle. Just a warning~!

    (though Gold isn't that bad for an A2 chemist at all)
    I agree, ive just spent over an hour on the Rg question and still havent got it :/
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    (Original post by Silverland)
    in that searching the elements given all together will bring up links containing them and 3 others

    it's just a dumb word game really though. Zilch chem
    Got it. Worst question I've ever seen on this website.
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    how do we get the concentration of vinegar ions in gold
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    White wine vinegar is about 4-5% acetic acid, but I'm not sure if that helps.
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    Got Gold, make sure you give your answer to about 5 dp. Write out the Ka expression, that should help.
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    help on gold been stuck on it for years
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    Okay, Rg is hard. Could possibly use area density of graphene and circumference of a cylinder if I knew the diameter of the tube.
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    (Original post by Snakefingers13)
    Okay, Rg is hard. Could possibly use area density of graphene and circumference of a cylinder if I knew the diameter of the tube.
    Yeah, I've been having the same problem, how can we find out what diameter it is?
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    Can someone PM me gold? I'm soooo stuck
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    Can someone also PM me gold?
    stuck is an understatement :c
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    Me too, I've been stuck on it for a while...
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    pm gold pleasssssssse
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    still stuck on entry level
    help, hint, anyone
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    Look: Ka = [H+][X-]/[HX]

    You know pKa and pH. It's rather straightforward then.
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    how do we know pka
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    (Original post by nihar97)
    how do we know pka
    That's the easy bit. Come on...
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    OMG, gold and its decimal places is annoying.
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    (Original post by Ferrarifan 27)
    Yeah, I've been having the same problem, how can we find out what diameter it is?
    I keep reading figures of around 1 nm to 1.2 nm, but plugging those in gives me stupid answers.
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    (Original post by Snakefingers13)
    I keep reading figures of around 1 nm to 1.2 nm, but plugging those in gives me stupid answers.
    Wiki says "Nanotubes have been constructed with length-to-diameter ratio of up to 132,000,000:1" but that doesn't give the answer either..?
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    There must be some simpler method for Rg
 
 
 
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