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    (Original post by yoomi)
    The last question 8b I got everything except the part when we have to find the molecular formula of G ! How did they get C4H6O2??? I am so confused I found the mole ratio 2:3:1 which is right

    Plz someone help me

    Thank you so much
    https://www.youtube.com/watch?v=EII_...hjyIYr&index=8

    Here's a video of someone working it out.
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    (Original post by itsConnor_)
    Molecular ion peak (M+) is at 86 = molar mass = 2 times the molar mass of the impirical formula, so double everything
    yeah I did not realize thank u soooooooooo much
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    (Original post by thymolphthalein)
    https://www.youtube.com/watch?v=EII_...hjyIYr&index=8

    Here's a video of someone working it out.
    OMG!! This is very helpful
    I wish I knew about this website before today
    Anyway Thaaaaaaaaaaaaank sooo much

    and good luck with your exams
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    (Original post by yoomi)
    OMG!! This is very helpful
    I wish I knew about this website before today
    Anyway Thaaaaaaaaaaaaank sooo much

    and good luck with your exams
    Hahah, I don't even do OCR, just happened to run into the same question the other day.

    Good luck to you too!
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    (Original post by thymolphthalein)
    Hahah, I don't even do OCR, just happened to run into the same question the other day.

    Good luck to you too!
    what exam board do you do?
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    (Original post by yasx_)
    what exam board do you do?
    Edexcel.
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    Good luck everyone

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    (Original post by C0balt)
    Good luck everyone

    Posted from TSR Mobile
    Cheers fam. U too fam :yes:

    Can you answer this question pls

    You know in atom economy, if like 2 moles of the desired product are formed, the molecular mass of the desired product would be 2*molecular mass?

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    (Original post by Windows 10 :))
    Cheers fam. U too fam :yes:

    Can you answer this question pls

    You know in atom economy, if like 2 moles of the desired product are formed, the molecular mass of the desired product would be 2*molecular mass?

    Posted from TSR Mobile
    Yup

    Posted from TSR Mobile
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    I know everything about reducing oxidation redox ect but for the ox. States if the number goes down is it reduced and if number goes up its oxidised
    Just want a way that would save me thinking time?
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    (Original post by samwillettsxxx)
    I know everything about reducing oxidation redox ect but for the ox. States if the number goes down is it reduced and if number goes up its oxidised
    Just want a way that would save me thinking time?
    Number is reduced, so species is reduced.
    Number goes down, species is reduced(or goes down, so to speak)


    So for oxidation numbers maybe just remember. Down, Down and Up, Up?

    Idk I don't really have a mnemonic for that one to remember it by in any other way.
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    (Original post by samwillettsxxx)
    I know everything about reducing oxidation redox ect but for the ox. States if the number goes down is it reduced and if number goes up its oxidised
    Just want a way that would save me thinking time?
    Try OILRIG! oxidation Is Loss Reduction Is Gain! Note, reduction doesn't mean go up though as gaining electrons which are negative pull you down however oxidation is where you give electrons up so positie
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    (Original post by thymolphthalein)
    Number is reduced, so species is reduced.
    Number goes down, species is reduced(or goes down, so to speak)


    So for oxidation numbers maybe just remember. Down, Down and Up, Up?

    Idk I don't really have a mnemonic for that one to remember it by in any other way.
    Thanks so if it was 0 to -4 it's reduced
    -5 to say 2 is oxidised?
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    (Original post by Bhavika22)
    Try OILRIG! oxidation Is Loss Reduction Is Gain! Note, reduction doesn't mean go up though as gaining electrons which are negative pull you down however oxidation is where you give electrons up so positie
    Yeah I do use oil rig I know all that I mean just so I can identify if it's reduced or oxidised quickly by realising if the ox state goes down it's reduced and if the ox state goes up its oxidised
    Thank u anyway
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    (Original post by samwillettsxxx)
    Thanks so if it was 0 to -4 it's reduced
    -5 to say 2 is oxidised?
    Yes exactly.

    I would have said OILRIG (oxidation is loss of electrons, reduction is gain of electrons), but that is more specifically for the loss of electrons.

    When you lose electrons, the charge will be postive.
    When you gain electrons, the charge will be negative.

    But you could have something go from +3 to +5 as well and it is will oxidized, so you can't always depend on it increasing from a negative to postive.
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    (Original post by thymolphthalein)
    Yes exactly.

    I would have said OILRIG (oxidation is loss of electrons, reduction is gain of electrons), but that is more specifically for the loss of electrons.

    When you lose electrons, the charge will be postive.
    When you gain electrons, the charge will be negative.

    But you could have something go from +3 to +5 as well and it is will oxidized, so you can't always depend on it increasing from a negative to postive.
    Thank u for all the help
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    I was just wondering if I've named this correctly?

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    (Original post by samwillettsxxx)
    I was just wondering if I've named this correctly?

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    Yep.



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    (Original post by thymolphthalein)
    Yep.



    Thank u, I know so many questions I'm sorry but in elimination does the OH attack the hydrogen on the carbon to the left of the carbon attached to the halogen
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    (Original post by samwillettsxxx)
    Thank u, I know so many questions I'm sorry but in elimination does the OH attack the hydrogen on the carbon to the left of the carbon attached to the halogen
    Wouldn't that be nucleophilic substituition, if it was a nucleophilic attack?

    It would come from the side that the halogen is not on.

    Elimination is when halogenoalkanes undergo a reaction with NaOH(or another alkali) to form an alkene, Sodium Halide and water.
 
 
 
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