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Unless you give us further details, one would assume that you must mention "basically everything that has got to do with the topic water quality"

Try drop to general. It shouldn't be much work... If it is, then drop general =O

Talent + work. If you have less talent, then you should do more work. It all adds up.

1. Pb 2+ is the only substance in that list that is a stronger oxidising agent than iron (refer to the data sheet), therefore Fe gets oxidised to Fe 2+ and Pb 2+ becomes Pb. Case a) Cu(s) will not react with Fe, because the reaction must be a redox reaction: for every oxidation half, there is...

Flame tests can only be used to test for cations. Hmm, there is a table that shows the different colours of cations in flame. I guess the other ones can be tested by precipitation, or AAS.

lol chemistry quiz... It's basically comprehension. No study required.

Indeed it is xD Still, Rebekkie, "relatively hardest" does not = "hardest HSC course" =P

Well, your percentile ranks seem pretty bleak, but since you're in top 50 school, I generously raised your scores. I would say around low/mid 80s

Borderline? Well technically, if anybody did a research on what their TRUE IQ is, they should know what it means. It's a measure of your intelligence, compared to your biological age. The formula is: IQ = Mental age / chronological age (real age) x 100 So technically, an average person has...

Yes, it does make sense, because you've inserted personal bias. Who's to say that applying mathematical concepts to complex questions in extension 1/2 is easy? If anyone did chemistry, they'd know that there are aweful lots of responses that you need to memorise in order to earn your 7 marks...

Explains why extension 2 maths, extension 1 maths, physics, chemistry, extension 1 english, extension 2 english, all have a lower scaling than modern history then... Rebekkie, aren't you contradicting your own statement then? "Bio's not hard" because there is a lot of stuff..."Modern is the...

Indeed. Well, anything is a waste of life when it brings negative aspects to your life, really =O It's certainly a waste of my life, because it'll drag down my UAI xD But, shit happens. Sleep a little less, and ta-da! You have more life to spend!

CO2 is much safer than CO...CO is poisonous =\

Well, it's quite hard to estimate what bands you'll get in the final HSC. That's why ranks are much easier. But since you don't have that, and you estimated all band 5 except english (I'll take band 4), then... Taking all marks as 80, and english standard 75, you get ~78 Taking all marks as...

You should be able to get it =) But you still gotta be consistent with your results...Don't bomb out! =O

I guess too hard of anything is bad =P But yea, as Undermyskin said, there is a natural buffer, so there shouldn't be a huge problem. Also, whether it strengthens animals' bones or not does not matter, because if there is a buffer system, then animals' bone strength won't change =\

1. a) They are asking what amount of the concentrated HCl is required to dilute it to 5L of 0.1M Moles of HCl in diluted solution = 5 x 0.1 = 0.5 mol Therefore 0.5 mol is needed from the 10M HCl Therefore volume = 0.5/10 = 0.05L = 50 mL of the 10M HCl There is actually a quicker way to do...

Re: If I'm ranked in the middle of my grade in a top 50 school, what UAI can I expect Hardcore: Shit, man! You have not made a contribution to this thread since you walked in. Now you're drifting us off topic. Wtf? OP: Yes, a UAI of 80+ is very possible. If you want 90+, I think you gotta get...

You're doing better in 3u than 2u? That's nonsense. 3U is basically 2U, except different topics. You never touched any 2u nor 3u in junior years anyway. Also, if you fail 2u, you really shouldn't be doing 3u. 3u in year 12 can get extremely difficult. I was doing pretty well in year 11 in 3u...

lol, don't you just swap the position of some atoms? xD