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Good site Rivet, Thanks

Hmmm. I think it is renewable to a CERTAIN extent. I wouldn't say totally renewable. Like wm said, its naturally occuring addition polymer. Due to demand and what have you, the natural sources can't keep up with demand etc. so this puts strains on the natural production. it's sorta like...

Don't forget, must have EXCESS of alkanol in reagents, say 10ml of Alkanoic acid and 12-15ml of Alkanol.

sorry other way around, acidic salt: NaHSO4 The HSO4- ion donates proton Basic KNO2 The NO2- accepts a proton

One thing need to remember: Basic salts: The anion is a weak base. Eg. NaHSO4 Acidic salts: The cation is a weak acid. Eg KNO2

practise.. find more questions... do all q's in the text bks..

diagram qts were quite straight forward i thought...

i agree.....

just be happy its over and dnt think about it until results come out.

i agree... state avem is <50%, so they will be scaled to around 60ish.

3unit skills were not needed. commen sense! y would 2unit examiners put 3u type qts in the exam!? The exam was relatively straight forward (exluding part 10(b)). The thing that threw many off was the amount of reading. take 10(b) for example. there was so much writing it was hard to...

last year: (2004) 102.8/120 = 94% since this yrs may have been harder: 100ish/120=94% (give or take)

methinks 92ish/120 will get band 6 easy.. i rekn 100/120.. bout 93% aligned HSC mark

Yeh, i agree. if it wasn;t 4 Qu10 i would be set, like round 110. but with added loss (if that makes sense) of marks in Qu10, i rekn 100ish mayb. but we'll c wen the results come bak..

Im in the same boat m8!!

I put 2018 too. coz n=12.23 how could it be 2017!?

I must say this had to be the hardest HSC exam ever written. 2003 was quite challenging but i think this topped it. as for the 90s papers. please! they were easy as! i rekn i did allright, dnt wanna talk much about it tho. probability screwed me. Qu5 part d)- raffle stuff was just not working...

since probability is non-mutually exclusive; ie: P(A or B)= P(A) + P(B) - P(A and B) Hence; P(>12 and composite)= P(8/20) + P(11/20) - P(5/20) = 7/10 (composite: opposite to prime) (u myte wanna check this)

OUr Ext. Subs start next term (term 4 2005)

I also think that this years HSC exam will be quite solid, since the CSSA trial was quite easy. i think Qu9 and Qu10 will be very difficult. *sigh* Having said this, the aligned HSC marks might be good! *fingers cross*