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PE comes in two forms LDPE and HDPE. LDPE is a highly amorphous solid, allowing it to be transparent and very flexible to the point where there is pretty much no rigidity. This is due to the significant chain branching that occurs in its polymerisation process, effectively limiting the size of...

yeah then it would be 3-carboxy-3-hydroxypropane-1,2-dicarboxylic acid or otherwise better known as 3-carboxy-3-hydroxypentanedioic acid but PLEASE NO ONE WRITE THAT FOR YOUR HSC. IT WAS JUST SOMETHING I WAS THINKING OF LOL ^ sorry but that's unrelated :P It never was name from the most...

Hmmm... 3-carboxy-3-hydroxypentanedioic acid?

hahaha, yeah I was like dafaq when I learnt it because i was like nigga that carbon backbone has 5 carbons, not 3... :( Yeah but still it's just interesting to note that. Lol. The justification is that it's a convention, apparently IUPAC just so happened to name it that.

question was one a few pages back. I answered it :L Yes but, you start on the carbon that is attached to the carboxylic acid as carbon 1. not the next carbon... it's weird. I've asked a few people and they always just said "oh its a convention" Hmm... I did mention replacing (or lack of). But...

nope you only are required to know one. but some questions are better focused with one or the other. I learnt both because I'm a nerd like that.

Yes but you said one benefit, and I didn't feel like talking about environmental benefit so i decided to go with social impacts... Its not wrong :C but that's because im lazy and its a 2 marker. If it was a 3-4 or more marker, then yeah no shit talk about the lead and the acid. I don't think 2...

Car batteries that last several years are highly beneficial to society and the environment. One benefit to society means that these batteries do not need changing (until their lifetime of several years is up). Usually, car battery charging is an automated process, facilitated by the alternator...

that was the point of it. besides, how did I go in your question? lol

you beat me to writing a new question Indicators are used to test chemical substances of their acidity/basicity levels. Indicators are commonly used as they are quick, disposable and reliable. They provide a range at which the indicators change colours, and further testing with other indicators...

"Despite the rapid industrialisation that is paralleled with scientific advancements, collaboration between scientists will always be required in furthering our understanding of chemistry." Discuss this statement in relation to a scientist which you have studied, making explicit references to...

pls only 99.95? I'm getting 99.96

Haha I'll keep that in mind, thank you. (are HSC markers such cunts?!) Yeah so did I.. looks like I haven't learnt my lessons, though :P Next question? :L

Haha... Sorry. It's just I said the said the same thing when it came up in the HSC last year or whatever year it was. Noted. Cheers :) I think I mentioned this of these implicitly: "microbes that wouldn't be killed by clorination (e.g. Gardia which was present in the 1998 sydney water crisis)"...

you're a cunt Microscopic membrane filters are not commonly used for the treatment of water in Sydney (with the exception of olympic park and newton). These membrane filters come in two types: capillary membrane filters and pleated membrane sheets. Both are made with a polymer (typically PTFE)...

Monitoring nitrate: Pass the sample through of granulated Cd/Cu which reduces the nitrate to nitrite Then add certain reagents to form an azo-dye of pink/purple colour Then determine concentration of NO3- relative to standards Monitoring phosphate: Add acidified ammonium molybdate -> a yellow...

bro i go dere gonna get 99.95 dux ez

ez 99.95 bro just stay on boredofstudies all da time

thanks for the info. I'm probably gonna try get chem-97, 3u-100 and 4u-99 Physics fucked up rank... Do you guys think it'll be possible for me to get Eng 90-91 Chem 97 3u 100 4u 99 Physics 94-95? :/ Really dubious about myself right now haha.

Hmm... Well lets say trials were unnecessarily hard for physics (who the fuck studies Einstein v. Planck) and well I usually don't say this one, but I was sick as fuck on that day - day after was UMAT and i also fucked that shit up pretty hard, that's why I'm aiming for a higher ATAR to go into...