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Recent content by ahmedrik1501

  1. A

    Phy paper33

    Guyxx how many marks are for bestfit line gradient and intercept as i was unable to complete them but other then that all did was awesome............... Superbly correct btw what was your percentage diffrence mine was 14.7%...
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    Bio Predictions

    yeah I think aquariangurl (hahahahha) is saying it right As Bio is nothing as compare to AS chem or any other subject hence do it all its takes me three hours finish the course all in one go... but have done it before...
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    Physics Practical/33 Info confirmation required

    hahhahahahahahha Mr. Isaac si saying he is good in electricity and not in mechanic whereas it was his theories which had become the base of mechanics.......hahahahhahahah............. wat a joke...
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    Chemistry 9701/P22

    Because NaOh was not in excess and whatever mols i.e. 0.045 mol and out of them 0.005 reacted with HCl and the other with Carboxyillic acid i.e. there was no excess mol in flask which stayed to hydolise th4e ester formed.
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    GT For Chem 22

    yeah Kc has no units and i think Gt will be around 50 smethng
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    Chemistry 9701/P22

    Ahhh Hassam Mr of BArium is not 56.. 137.33.. 55.5(56) is for ferrous or what you call as Iron........ hence 81.1/137.33 =0.59 18.9/16 = 1.18 and 1.18(or 1.2)/0.59(or 0.6) gives us 2:1 hence BaO2
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    Chemistry 9701/P22

    yeah it was 0.6:1.2 hence 1:2 it was for sure barium superoxide or rather bariumperoxide
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    Chemistry 9701/P22

    I think the paper was quite easy just messed up BaO2 wala part and the did addition instead of subtraction in bond enthalpy hence lost one marks of answer. Rest the paper was easy and MgSO4 is highly soluble in water hence we could have said it. Kc part was cake.... and got 2.25 as the answer...
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    Chemistry 9701/P22

    Co2 as Ba(OH)2+CO2(aq) >>>>> BaCO3+ H2O
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    Define Chem p33 in 2-3 words!

    Fa7 cant be BaSO4 as BAso4 is insoluble in water. and as far as H2So4 is concerned i think it cant be as Examiners are not fool to say to write cation and if this is the case then they would definatley give us marks on both as the question was salt analysis not acid analysis u c. and in two...
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    How was your Chem P33?

    redox Grp 7 reaction Br to Br2 and So42- loxt hydrogen
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    How was your Chem P33?

    i am shocked :shock: :shock: i dont know what was so hard in the paper. It was easy.. Guys we all know that titration part was Mohr's salt was so difficult in it. For q2 it was again easy.. Was the easiest u need to heat and use unitary method. Dnt knw why u guyx thought it was a hard paper...
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    Chemistry p33

    i think you would have got till mass of water.... and mols of water... if not then mols of water are 1.04/18 =0.057 (f) i hop it was this part troubling you..... so if 7 mols of H2O are their in 1 mol of XSO4 then using ratio method 0.057/7 =8.14x10^-3 part G: Mr= mass/mol hence...
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    Chemistry p33

    i solve each of them and i will tell u the answers till night k
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    Chemistry p33

    its easy very easy.... U need to use ratio method... using your values 8.56x10^-3 of FeSO4 gives 0.03 mols of water so 1 moles of Feso4 will gives W mols of water 0.03/8.56x10-3 = 3.5 so u can give the value rounded of to be 4 or 3 its ur choice....... :beer: :D :ROFL:
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