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a) reaction: hydrogenation of ethene, e.g. addition of H2 (hydrogen) to ethene. Alkenes are unsaturated (presence of dbl bond, whilst alkanes are saturated). C2H4 + H2 -> C2H6 b) Test: bubble the ethene through bromine water in a test tube, if the bromine water does not decolourise all the...

close to 94-95 atm.

did you get a state rank in biology? I know that 97 would have achieved a state rank last year.. but depending on how 'high/low' that 97 is.

94 minimum.

85 max.

Your only 4 marks behind 1st.. why so worried? Your doing mx2, you should know that 4 marks isn't 'really behind'. Anyway - generally the thing that differentiates students isn't the minor topic tests worth 15-20% but rather the large more difficult tests, e.g. trials, half yearlies etc.

bump. Selling Biology (96) notes, check link in my sig.

Thank you carrot, me loves you very much :) unfortunately can't rep you coz I have to share it around =/ Everything makes perfect sense. Only difficulty i'm having is understanding c) Unfortunately because I don't know how to use latex you misinterpreted the question. The first part is: f(x)...

a) Let z = a+ib be a complex number, where a and b are real numbers. Prove that the reciprocal of z (i.e. 1/z) is a complex number. z = a+ib 1/z = 1/a+ib = 1/a+ib x a-ib/a-ib = a-ib/a^2+b^2 = a/a^2+b^2 + i b/a^2+b^2 and therefore 1/z is complex as it has a complex component Im (z) =...

85-88

PM'd.

Added on FB and replied :)

haha tanks bebz! you some smexy, penguiny bebz right there.

so when the question asks for rectangular FORM.. is that just x + iy form? so you don't give your answer as (-5,0) but rather -5 + 0i?

tanks babeh! ooh.. i never noticed those buttons on the calculator.. how do you use them.. when i input numbers of sin or cos i get maths errors.

ahhhha! there you go mateeyy, lot of luv <3

What is rectangular form? E.g. Express 5cisπ in rectangular form. Also, when it says express things in polar form is that just another word for mod-arg form? AND, lastly.. when finding the argument, and not getting a nice number not an exact value for tan inverse, do you present the...

true.. i bought one the other week as well - my first tablet.. pleasantly surprised with how good it is. But yeah, your definitely right.. it is quite big, and in terms of carrying it around it's basically attached to me everywhere i go now which can get a little annoying at times.. but I...

tanks :)