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    (Original post by TomSouthwell)
    Radicals React with O3 in a propagation Reaction
    This results in more radicals being produced that can again reacts with O3
    It is a continous chain reaction where O3 is not being replaced
    Therefore, one radical can remove thousands of 03 Molecules from the atomsphere
    This reduces the size of the Ozone
    Letting In harmful radiation leading to more Skin Cancer and Cateracts of the eye.
    oh ok .. i rekon i got about 4/3 of those..
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    (Original post by lpmad)


    I mean the 5 mark question which talked about the role of cl .. was it just to catilitically break down 03 molecules, and theyre bad for the environment blah blah blah... but what else could you have said about the role of cl?
    Look above
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    Can anybody else remember any difficult questions?

    Oooo actually: Why is the gas not cooled before it enters the car ?
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    how did u guys work out the mean titre
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    (Original post by TomSouthwell)
    Can anybody else remember any difficult questions?

    Oooo actually: Why is the gas not cooled before it enters the car ?
    I thought it was because if it was cooled the reaction would occur too slowly, and in car engine you need it to occur fast.. as a lot of it is being produce.. i just guessed that..
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    (Original post by Itachi8)
    how did u guys work out the mean titre
    (27.95+28.05+28)/3=28.00
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    (Original post by Itachi8)
    how did u guys work out the mean titre
    You take the ones that aren't anomalies add them together and in this case there were 3 (within 0.2 cm^3 - answer to another question) then divide by 3
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    (Original post by lpmad)
    I thought it was because if it was cooled the reaction would occur too slowly, and in car engine you need it to occur fast.. as a lot of it is being produce.. i just guessed that..

    yeah i put some thing to that effect.
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    (Original post by lpmad)
    I thought it was because if it was cooled the reaction would occur too slowly, and in car engine you need it to occur fast.. as a lot of it is being produce.. i just guessed that..
    Haha, this could be completely wrong, but I said if the gas is cooled it would reduced the pressure of the gas thus shifting the equilibrium to the side where there are more molecules, causing NO2 and CO to be produced... (they were the ones on the left) and these are more dangerous than CO2 and N2
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    (Original post by TomSouthwell)
    Haha, this could be completely wrong, but I said if the gas is cooled it would reduced the pressure of the gas thus shifting the equilibrium to the side where there are more molecules, causing NO2 and CO to be produced... (they were the ones on the left) and these are more dangerous than CO2 and N2

    i dunno but i some how got the feeling that they wanted something to do with temperature
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    Ahhh nooo I flopped some questions
    Got the isomer one. I didn't flop whole questions just lost a few 1 marks... what was the one about the group 7 multiple choice which was not true?
    The options I think..
    1) They all have variable oxidation states
    2)
    3) Electronegativity decreases down the group
    4) (Iodine is a stronger reducing agent than bromine??)

    Should be okay I got 120/120 UMS for unit 1 so I only need what.. 60 for an A?
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    i did the mean titre wrong now all my quesstion wrong because i didvide by 4
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    Yeah, that's true to be honest, but I just thought it was convenient the more dangerous gases were on the side which would be affected by a low pressure...
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    (Original post by Phalange)
    Ahhh nooo I flopped some questions
    Got the isomer one. I didn't flop whole questions just lost a few 1 marks... what was the one about the group 7 multiple choice which was not true?
    The options I think..
    1) They all have variable oxidation states
    2)
    3) Electronegativity decreases down the group
    4) (Iodine is a stronger reducing agent than bromine??)

    Should be okay I got 120/120 UMS for unit 1 so I only need what.. 60 for an A?
    Ermmm I think I put 1.) not sure tho
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    what did u guys put about the ketone which was
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    (Original post by TomSouthwell)
    Ermmm I think I put 1.) not sure tho
    I did too
    ... I thought fluorine always has -1
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    (Original post by lpmad)
    I thought it was because if it was cooled the reaction would occur too slowly, and in car engine you need it to occur fast.. as a lot of it is being produce.. i just guessed that..
    I agree... think this is correct
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    hope the grade boundaries are low
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    (Original post by Itachi8)
    what did u guys put about the ketone which was
    the ketone was the CH3CH2CH(OH)CH3 one because it forms from a secondary alcohol which has two carbon atoms attached the the carbon atom that the -OH group is attached to... I dont know the question tbh..
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    (Original post by Itachi8)
    what did u guys put about the ketone which was
    was it b) ? ... it was the secondary alcohol

    and the ketone was CH3CH2CHOCH3 Or summing like that
 
 
 
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