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    (Original post by Dylann)
    No it's not "wrong" because it would get you the marks in an AS exam. Hey, look at the title of this thread, it says AS!! Not Advanced Highers!
    It is technically correct anyway as you will get some dibromoalkane formed but the major product would be a bromoalcohol

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    (Original post by NutE)
    resitting unit two even though I got 83/100 (which was just an A), to get a higher A.
    Forgotten most of the content, so I'm starting my revision for this now
    if the papers the same as last year uh oh . Or you could benefit from the low boundaries haha
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    (Original post by samb1234)
    It is technically correct anyway as you will get some dibromoalkane formed but the major product would be a bromoalcohol

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    No it's not 'technically correct'... both the bromoalcohol and dibromoalkane form via the bromonium ion intermediate.
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    (Original post by ThatGuyRik)
    if the papers the same as last year uh oh . Or you could benefit from the low boundaries haha
    what do you mean?
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    (Original post by NutE)
    what do you mean?
    Did you do OCR A F322 last year?
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    (Original post by ThatGuyRik)
    Did you do OCR A F322 last year?
    nope, AQA
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    (Original post by langlitz)
    No it's not 'technically correct'... both the bromoalcohol and dibromoalkane form via the bromonium ion intermediate.
    I hadn't actually looked at his mechanism. I was just saying that some dibromoalkane would be produced it would just be the minor product

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    What do you think full ums is for edexcel unit 1


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    (Original post by Amethyst-Wolf)
    Thanks _NMcC_ ! Thats super helpful
    No problem!

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    hey

    whats the mark scheme definition for

    enthalpy change of reaction,
    enthalpy change of formation,
    enthalpy change of combustion;\

    ??

    thanks
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    (Original post by samb1234)
    I hadn't actually looked at his mechanism. I was just saying that some dibromoalkane would be produced it would just be the minor product

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    yes^
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    (Original post by hibaj)
    hey

    whats the mark scheme definition for

    enthalpy change of reaction,
    enthalpy change of formation,
    enthalpy change of combustion;\

    ??

    thanks
    Enthalpy change when the amount shown in the equation react under standard condition 298K 100kPa

    Enthalpy change when a mole of compound in standard state is formed from it's constituent elements in standard states under standard condition

    Enthalpy change when a mole of a compound or an element reacts with oxygen completely

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    (Original post by C0balt)
    Enthalpy change when the amount shown in the equation react under standard condition 298K 100kPa

    Enthalpy change when a mole of compound in standard state is formed from it's constituent elements in standard states under standard condition

    Enthalpy change when a mole of a compound or an element reacts with oxygen completely

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    thanks!
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    On "q=mc(deltaT)" questions the unit for temperature in the mark-scheme is degrees Celsius. Surely if the units for specific heat capacity is JK^-1g^-1, then temperature should be measured in Kelvin?
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    (Original post by Dylann)
    No it's not "wrong" because it would get you the marks in an AS exam. Hey, look at the title of this thread, it says AS!! Not Advanced Highers!
    sorry yeah I was thinking this was an A level thread for some reason. I still don't think simplifying it by making it wrong is helping anyone. It's not even any simpler really
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    (Original post by C0balt)
    thats makes more sense
    teacher wtf
    COBALTTTT pls check ur inbox thnxx
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    (Original post by Windowswind123)
    On "q=mc(deltaT)" questions the unit for temperature in the mark-scheme is degrees Celsius. Surely if the units for specific heat capacity is JK^-1g^-1, then temperature should be measured in Kelvin?
    if you think about it the difference between the temperatures in Kelvin is exactly the same as the difference in temperature in celsius, theoretically you are meant to work in Kelvin but this missed out step would not alter your answer
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    Ah yes, I was adding 273 to the temperature in Celsius. But of course as it is a change it would be the same. Thanks for that.
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    Hi can someone please explain these two questions for me? Thanks

    1) How many unpaired electrons does a does a Nitrogen atom in its ground state have?

    2) When 0.1mol of atoms of an element reacts with chlorine there is an increase in mass of 7.1g. A student is told the element could be Carbon, Sodium, Magnesium or Aluminium. What is the element?

    Especially the second one I'm not sure about! Thanks
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    (Original post by gabby07)
    Hi can someone please explain these two questions for me? Thanks

    1) How many unpaired electrons does a does a Nitrogen atom in its ground state have?

    2) When 0.1mol of atoms of an element reacts with chlorine there is an increase in mass of 7.1g. A student is told the element could be Carbon, Sodium, Magnesium or Aluminium. What is the element?

    Especially the second one I'm not sure about! Thanks
    N has electronic configuration of 1s2 2s2 2p3 and in p orbital the three electrons are unpaired


    Where can the increase in mass come from? Only chlorine. So calculate the number of moles of chlorine atoms (well they are ions but molar mass is the same anyway) in that compound
    See the ratio of 0.1mol and the amount of chlorine and you will see

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