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    (Original post by jonzza_81)
    write the elements in order of atomic mass, space between the symbols, no commas
    Thanks, on to silver now
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    (Original post by amtheril)
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    are the symbols in copper "Sb, W" ?
    Spoiler that.
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    (Original post by alow)
    Spoiler that.
    yeah sorry I will take it down
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    (Original post by alow)
    Spoiler that.
    can you show me how to do Rg? I keep getting the value of 0.000104 hours, but this is obviously wrong.
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    (Original post by amtheril)
    can you show me how to do Rg? I keep getting the value of 0.000104 hours, but this is obviously wrong.
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    Use a DE to model how long it would take to fill the balloon.
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    (Original post by alow)
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    Use a DE to model how long it would take to fill the balloon.
    What is DE?
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    (Original post by amtheril)
    What is DE?
    I don't understand
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    (Original post by amtheril)
    I don't understand
    Differential equation.
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    (Original post by ElMoro)
    ...
    I hate cambridge!
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    You don't need diffs to answer Rg
    My chemistry teacher gave everyone this sheet to help
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    Name:  IMG_20140429_095358418[1].jpg
Views: 60
Size:  265.1 KB
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    (Original post by jonzza_81)
    You don't need diffs to answer Rg
    My chemistry teacher gave everyone this sheet to help
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    Name:  IMG_20140429_095358418[1].jpg
Views: 60
Size:  265.1 KB
    That uses the integrated form of the DE.
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    (Original post by alow)
    That uses the integrated form of the DE.
    im so dumb.... now im getting 1663 hours but that is also wrong urggh..... in the end, a semi final conclusion was that 0.5006573143=t/h - is this correct or wrong?
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    (Original post by amtheril)
    im so dumb.... now im getting 1663 hours but that is also wrong urggh..... in the end, a semi final conclusion was that 0.5006573143=t/h - is this correct or wrong?
    by the way thank you for putting in the effort of taking the photograph - it should have helped me alot
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    (Original post by amtheril)
    im so dumb.... now im getting 1663 hours but that is also wrong urggh..... in the end, a semi final conclusion was that 0.5006573143=t/h - is this correct or wrong?
    Close, but no cigar.

    For that picture, it's really just a ****ty way of solving

    \dfrac{\text{d}M}{\text{d}t} = \text{A}e^{-\text{k}t}, \:  \text{k}, \text{A} \in \mathbb{R}

    You should be able to work out what k and A are pretty easily.

    As for where you're going wrong:
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    I think you may be using RTP not STP
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    (Original post by alow)
    Close, but no cigar.

    For that picture, it's really just a ****ty way of solving

    \dfrac{\text{d}M}{\text{d}t} = \text{A}e^{-\text{k}t}, \: \text{k}, \text{A} > 0, \:  \text{k}, \text{A} \in \mathbb{R}

    You should be able to work out what k and A are pretty easily.

    As for where you're going wrong:
    Spoiler:
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    I think you may be using RTP not STP
    alow you do me too much honour!!!
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    hey im on the gold challenge, but my poor year 11 brain cant handle this, i think its something to do with it being a crystal (ionic lattice), ive tried using CPK colouring to determine the elements but that doesn't work, i think the fractions are just to show the position on the atom, but are they more relevant, any useful tips for figuring it out ??
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    Guys it's almost May!!:eek:
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    (Original post by fizzers)
    Guys it's almost May!!:eek:
    ARE YOU EXCITED
    because I am
    :ahee:

    Posted from TSR Mobile
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    YES OF COURSE
    although i feel like i won't be happy for too long bc I'll probably be frustrated more than aything
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    (Original post by fizzers)
    YES OF COURSE
    although i feel like i won't be happy for too long bc I'll probably be frustrated more than aything
    That is true
    Also I really enjoy sleep and I'm not likely to get any tonight
    OH WELL

    Posted from TSR Mobile
 
 
 
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