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hey do you help for chemistry too?

anyone knows the energy cycle from jn 11 p41 q1)b) the answer for the lattice energy is -12753 kJ per mol

hi:) i also did this question but got stuck on this: didnt they ask for the resistance in terms of R, then y do we write 'infinity' which is not in terms of R?? o_O

really helpful thXx :)

someone plz help with oct/nov 07 p1 Q37 http://www.xtremepapers.com/papers/CIE/Cambridge International A and AS Level/Physics (9702)/9702_w07_qp_1.pdf the answer is C and does anyone of you has the variable 2 for jun 09? i mean jun 09 p22... plz i really need it :O

for Q24 its A since incomplete combustion of a hydrocarbon gives CO, while complete combustion gives CO2 and H2O

i was wondering about that in may/jun 2007 Q40( physics). we need to divide proton no. by nucleon no., n i don't get it why...:confused:

hey thxx can u explain the last one? y do we need 2 divide proton no. by nucleon no.? is it a specific definition?

thXx:) i didn't quite understand Q10, 13 18 and 35, cud u help me with these? i looked for it from here: http://xtremepapers.com/community/threads/as-physics-p1-mcqs-yearly-only.17330/page-9#post-330586 bt still i didn't understand:(

hmm, well i wud like to, bt am not that good in P5, still i cn try 2 :)

really helppful advice as well thXx very very much :D

hey good one:D this really helped me correct all my mcqs n understand them well but for Q15: answer is A when height fr0m gr0und is zer0 (i.e object is on ground) P.E is also zer0 but when height increases, pe also increase B is showing that at max. height. p.e is zero which is wrong.. :O

hey u explained Q36 really well:) bt i'v a doubt for Q10, u said the acceleration becomes 0, but A also shows shows this, cud u clear my doubt plz??:unsure: i also didn't get Q13, the force F at the centre will have no turning effect, but the other one will, then they aren't in equlibrium or...

heyy:) the answer is certainly not D since the ketone won't react with sodium metal R u sure the answer is A?? since propan-1-ol also, just like propanone won't react with tollen's reagent anybody help!!:cry:

i too liked the chocolate, n now it became more easy to understand :D

Hi, did anyone do the chemistry practical of may/jun 2012 paper 35? I'v a doubt on the last part in Q3, it says add FA5 to FA4 i got a white precipitate , then it said add HCl and i got a yellow/orange ppt.. the identity from the MS is sulphate ion, can s0me0ne explain?:unsure:

hey thXx :)

is there any for physics?? cud u plz paste the link here?? O.o

hey someone has the mark scheme of nov 02 p1??

thXx very much,, now i understood:)