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ok..try drawing the 2 graphs seperately... shade in teh conditions and put them on to top each other. the over lapping part is the answer

thuck a stress b4 the exam...try to cram everything in and in the exam...it comes bak to u... if u listen in class, other things might come up (happened to me in eco)

sure..i'll help

methane C2H6... empirical CH3... pretty sure now

yeah.. always round up.... methane (C2H6) H H | | H-C-C-H | | H H ugly diagram =.='

rewrite xy=1 as y=1/x (hyperbola)

me justify...u round up the 2.5 -> 3so u get CH3 alkane....yeah, times CH3 by 2 u get C2H6 (methane) i reckon my test was esay, all my past papers were way harder

which question?

WooT!!! my exams ar over!!! chem today! any more questions?

ok...u have the formula: /\H = mC/\T /\: delta (change in..i know its dodgy, suppose to be a triangle) H: energy in joules m: mass of the substance being cooled or heat in grams C: specify heat capacity (joules/grams kelvin) T: temperature (final - initial) the heat capacity is...

woah..connections...one in my skool, one in st ives, i bet many elsewhere.... o.O i need to liquidpaper out my stupid answers...did them under stress so i wrote bullshit..xD. i'll do it on tuesday nite of cuz the 3u classes covered calculus, we did product, quotient rule and 2nd...

i'm pretty sure that our sci faculty buys their paper..cuz i've seen same questions in papers different years and different schools, maths the faculty makes the teacher...usually different teacher throughout the year, the A class teacher is making ours so it is very hard...not sure about...

woah! calculus already, ur skool is fast... wat do u mean u ranked 64th next yr, wat sub? did u repeat? o.O

well it depends on the substance. it has to polar and how polar it is. lets say ethanol..it dissolves in water because of the plar end from the OH, the CHs are ignored. once u get a long chain of CHs and only one OH at the end, the OH becomes to weak compare to the long chains (C40), it will not...

yeah....met him from tuition?

cant u get past papers from other sources? i mean come on, the teachers can stop u from asking friends from other schools or from ur tutor. if they use the same paper again every yr, just ask some one in yr 12 and give them their paper

let them do it the hard way xD

my school gives u the STP, SLC info behind the periodic table in the paper, u just have to work out which one to use. eg:experiment peformed at 25C (lab condition) the number changes, cus my says 24.79 at SLC, just stick to the one in ur exam paper. funny thing is this wasnt covered in...

okie dokie! last year 2u paper from my school (homebush boys) http://rapidshare.de/files/5006744/2u_Maths.pdf.html have fun =P

no numbers in chem...unless the avogadro's number... pretty good explaination! cant do better...