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How important is structure when doing 7 mark question and such. Will they mark you down for poorly structured answers?

He did add an equation though

Do a search. It is on this forum somewhere

Excellent, good to hear

Intermolecular forces are all you need to say in chemistry

A lot of people have trouble with this. Basically polymerisation is a random process, elaborate on that and you'll be laughing

That WILL get you all 7 marks. As long as you get all the info right

Well I didn't actually say that, but thats what I meant

What is the answer for this? I thought it was D but according to Success One I'm wrong, and I don't know why

Well if anyones doing PLA (polylactic acid) Alcaligenes eutrophus is fed starch, which produces lactic acid monomers produced by the bacterial digestion. Condensation polymerisation occurs and you get PLA Used for medical implants and disposable plastic Properties: Strong, flexible and...

Ok, sounds reasonable. Saying colorimetric processes would be enough though wouldn't it? There won't be too many marks for a question like this

Excellent, thought as much

What is the common name for this?

n = 6 x 10-4 * .150 = 9 x 10-5 M = 86 mass = 86 * n = 0.00774 grams Damn them taking decimal points

PLA. Wooh!

I understand that, but for an answer you would right oxidation is now occuring at the cathode. Is this technically correct?

If it has a two next to the H it is diprotic H2SO4 ... 2 next to the H

As in 18c of 2001 HSC Would you say the oxidation is now occuring at the cathode or/ has the anode and the cathode switched?

H+ concentration is 2 times the sulfuric acid concentration as it is diprotic Therefore, [H+] = 1 * 10^-3 pH = -log[H+] = 3 EDIT: Wow people are answering questions quickly at the moment

A colorimeter can be used to determine the concentration in ppm of nitrogen (shouldn't exceed 600ppm) and phosphorus (shouldn't exceed 60ppm). If ratio of N:P exceeds 10:1 this indicates that eutrophication has began. Can't remember exactly how colorimeter works, has something to do with the...