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well done

Very bad supervisors

Dang got Q14 b/c i didn't balance eqn... :(

That question was posted up by someth1ng on the chem marathon lol

re: HSC Chemistry Marathon Archive it is wise to label which one is acting as a base and which is aciting as acid otherwise markers will give u zero!

For silver button, i use 'trigger' words I remember oxidation by saying hydroxide ion and reduction by saying water (zinc is oxi b/c of standard reduction potential - so no need to memorise that this is oxidation) hope this helps lol

re: HSC Chemistry Marathon Archive yeh

lol just hope your brain will function properly on the day

Get things memorised (commercial batteries, equations for production of commercial radioisotopes, local catchment, etc)

naughty

re: HSC Chemistry Marathon Archive External things that can impact the shape of the graphs and it all depends on the states of reactant and products and whether there is an enthalpy change. Changes include: -addition or removal of reactants and products (hence changing their concentration)...

re: HSC Chemistry Marathon Archive 1) Halons have bromine atoms, CFCs don't 2) Halons has a higher ozone depletion potential than CFCs as bromine radicals are more dangerous than chlorine radicals gonna bump this

Use the general solution for cosine: cos(x) = \alpha \\ \\ \therefore x = \pm cos^{-1}(\alpha) + 2n \pi Where 'n' is an integer EDIT: It should be: If cos(A) = cos(B) Then, A = +/- B + 2k (pi)

re: HSC Chemistry Marathon Archive hahhahahhah

re: HSC Chemistry Marathon Archive Q: Compare the chemical and physical properties of ethane and ethene 3 marks

re: HSC Chemistry Marathon Archive So what other equations could you write?

re: HSC Chemistry Marathon Archive ^This idea is very weird, i see different things in different sets of notes and textbooks

Ahh what a relief, thanks! (90 for MX2...)

Re: HSC 2012 Chemistry Marathon B?

You are 99plus so you should know this lol For sulfate reducing bacteria, you only need 1 equation SO4 (2-) (aq) + 10H+ (aq) + 8 electrons --> 4 waters + H2S (aq) (theres one that produces hydroxide ions...but my teacher said dw about it) To remember this, just remember coefficients, and say...