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    (Original post by SazahSauce)
    The acid was HNO2 because the equation wouldn't have balanced as HNO3
    yessss, molecular was h2No2O4 cos there were no other products

    empeirical HNO02
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    (Original post by bigzman123)
    yessss, molecular was h2No2O4 cos there were no other products

    empeirical HNO02
    No, it was HNO2, nitrous acid.
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    (Original post by bigzman123)
    yup there were 5 moles in total so 1200
    2 moles on left hand side though
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    (Original post by GillyTheGhillie)
    No, it was HNO2, nitrous acid.
    That's what I got.
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    (Original post by sqr00t)
    2 moles on left hand side though
    yh divided first mol answer by 2 and times 5
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    (Original post by sqr00t)
    2 moles on left hand side though
    Yes, it would have been 2400 had he not taken that into account, the correct answer was 1200
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    (Original post by sqr00t)
    2 moles on left hand side though
    There were two different gases on the right hand side, you had to divide moles by 2 to get 0.01 and multiply moles by 2 to get 0.04 so there was 0.05 moles of gas on the right hand side
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    (Original post by SamH213)
    It was nitric acid hno3, i thought it was pretty straightforward if im honest, probably the usual stupid mistakes though.
    I got nitrous acid, because I tried doing a balanced equation with nitric acid and it wouldn't work, just praying that the dumb mistakes aren't too many, I was really annoyed with the oxygen oxidation number and the naming of SF6
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    (Original post by bigzman123)
    i think you then times that answer by 2 as it is in N2 moecule, explains the two marks
    No you dont, you were given the number of molecules of N2, you needed to find moles of N2 molecules
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    (Original post by GillyTheGhillie)
    No, it was HNO2, nitrous acid.
    yh typo
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    (Original post by GillyTheGhillie)
    Someone remind me of the questions not listed here cos I forgot some.

    1. Seriously if you dont know protons neutrons and electrons relative mass charge and position, theres no hope.

    S: Spherical
    P: Dumbell

    Relative energies I was unsure

    Nitrogen dotcross had 3 crosses and 3 dots shared between the and one lone pair each.

    No of moles of nitrogen atoms was 1.7 x10^-3

    Remind me of others for q1

    2. Remind me of q2

    3. Ditto

    4. Ditto

    5. Ditto

    6. Ditto

    Unsure what question numbers:

    Halide test question minimum no was 2 and it was bromine water plus the chloride and iodide, layer colour plus chloride was orange, plus iodide was purple

    Mass of aluminium sulfate formed was 0.120 grams

    Volume of gas produced was 1200 cm^3

    Reason sodium has lower mp was because it has a higher ionic radius and lower charge.

    Vdw comes about because of uneven electron diatribition causing instantaneous dipoles that induce dipoles in other atoms that causes them to be electrostatically attracted

    Reason bromine has a higher bp was because it has more electrons so more likely to have uneven electron distribution.

    Acid produced was Nitrous acid, HNO2

    Calcium compound used to change soil pH would be hydroxide or oxide.

    6Ca plus P4 goes to 2Ca3P2

    Ionic structure was 3 Ca^2+ ions and 2 P^3+ ions.

    Oxygen was 2+ in oxygen difluoride.

    2F2 + 2NaOH goes to F2O + 2NaF + H2O

    Bond angle was 104.5°

    Remind me of qs and Ill give answers
    Ionic structure was 3 Ca2+ and 2 P3-. Oxygen was +2 oxidation number. I thought the bond angle was 180 and linear but that's probably wrong, how many marks was that question.
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    (Original post by sqr00t)
    No you dont, you were given the number of molecules of N2, you needed to find moles of N2 molecules
    No, you needed to find the number of moles of Nitrogen ATOMS, so x2.
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    (Original post by UnknownAnon)
    I got HNO3 for the acid. And I have a feeling it will be higher. From what I've heard, most people found it easy and everyone who did it is retakers. Btw did anyone else write sulphur fluoride instead of hexaflouride? :facepalm:

    Posted from TSR Mobile
    Oh I got nitrous acid, because I couldn't make the balancing work with nitric. oh no, when you mean higher do you think it will be like fifty something for an A or if we are lucky maybe 49? :P I wrote sulphur fluoride but some people put hexflouride, which I feel is right
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    (Original post by MrKmas508)
    Ionic structure was 3 Ca2+ and 2 P3-. Oxygen was +2 oxidation number. I thought the bond angle was 180 and linear but that's probably wrong, how many marks was that question.
    ****, typo, should have been P^3-, edited now
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    (Original post by sqr00t)
    No you dont, you were given the number of molecules of N2, you needed to find moles of N2 molecules
    Moles of nitrogen atoms"
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    (Original post by MrKmas508)
    Ionic structure was 3 Ca2+ and 2 P3-. Oxygen was +2 oxidation number. I thought the bond angle was 180 and linear but that's probably wrong, how many marks was that question.
    I got linear and 180 too! Not sure if it was 1 or 2 marks tho. Gonna hope its right
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    Ocr tricked me with the bond angle of SF2. There were two lone pairs grrr

    Posted from TSR Mobile
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    what do you guys think grade boundaries will be !

    realistically
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    (Original post by Dolphinflips)
    I got linear and 180 too! Not sure if it was 1 or 2 marks tho. Gonna hope its right
    it was 104.5, non-linear/bent 2 bonded pairs 2 lone pairs
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    (Original post by Dolphinflips)
    I got linear and 180 too! Not sure if it was 1 or 2 marks tho. Gonna hope its right
    It's wrong, OF2 has the same structure as water, has 2 lone pairs so vsepr states that it is 104.5
 
 
 
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