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Chemistry: Post your doubts here!
em not very good at expalining things.. first go through the notes that i have attached and then try to understand this : first find the number of carbon atoms by [(100/1.1)x(M+1/M)] 3H gives a singlet,which means that they are directly attached to the more electronegative element or the... -
Chemistry: Post your doubts here!
electron donating groups ; all alkyl groups, -OH, -NH3 ,-OCH3, -N(CH3)2........... withdrawing groups : -NO2 , -SO3H , -COOH , -CN , -CHO , -CO- , -CO2- , -CONH2- , -CONH- -
Mathematics: Post your doubts here!
y= lnx/x^2... we have to use integration by parts .. u = lnx so du/dx=(1/x) dv/dx=(1/x^2) so, integral of v=(-1/x) (i am using ! as the sign of integral) the formula is: !u(dv/dx) = uv - !v(du/dx) = lnx(-1/x) - ! (-1/x)(1/x) = -lnx/x + ! (1/x^2) obtain the second integral: = (-lnx/x) - (1/x)... -
Chemistry: Post your doubts here!
[^__^].. yeah i know, our chem sir did correct some mistakes in it... wel i have learned the concepts, so now i think it would be wise to do the pastpapers?.. cuz i did my core with the pastpapers em just left with the applications :/ -
Chemistry: Post your doubts here!
doing the application chapters from the application booklet and chemistry coursebook (roger norris) is enough ryt ?o_O -
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A level Biology: Post your doubts here!
can someone explain me the vertical and horizontal transmissions ?(n) -
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:D.. I was such a potterhead that I used to believe that there indeed is a school like...
:D.. I was such a potterhead that I used to believe that there indeed is a school like HOGWARTS..... and when I turned 11 and didn't get my LETTER.. my heart was shattered and smashed :D ;)- biba
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Chemistry and Physics some Keypoints/Notepoints (onDemandOnly) !! :)
jazakALLAH... that is what a sane person does.. work hard.. pray and TRUST ALLAH ALMIGHTY! -
Chemistry and Physics some Keypoints/Notepoints (onDemandOnly) !! :)
jazakALLAH!!! knowitall10.. did any1 tell u that u r so self-less and helpful!! truly a lifesaver!! may ALLAH bless u with success! ameen! -
Chemistry and Physics some Keypoints/Notepoints (onDemandOnly) !! :)
yayy!! lets die together!!! em so freaked out man... on monday i hav chem p4 and maths p3.. then wednesday its physix p4 anh maths S1.. and friday its bio :cry: :( :cry: -
happiness can be found even in the darkest of times.... if one truly remembers to switch on the...
happiness can be found even in the darkest of times.... if one truly remembers to switch on the lights !!- biba
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ahahahaha lolx... yeah em proud to be a potterhead!
ahahahaha lolx... yeah em proud to be a potterhead!- biba
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Mathematics: Post your doubts here!
The complex number u is defined by u = (1 + 2i)^2 / (2+i) (i) Without using a calculator and showing your working, express u in the form x + iy, where x and y are real. [4] (ii) Sketch an Argand diagram showing the locus of the complex number s such that |s − u| = |u|. [3] can sum1... -
Chemistry: Post your doubts here!
np !! wel I think em pretty bad at explaining :p but *thumbs up* if u understood what I said :ROFLMAO: