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doesnt matter. still need to know, obviously. :rolleyes:

rofl... :D:D:D how can there be a 6-marker on the use of acid in esterification for catalysis? in the syllabus, its like an explain question... sorry but do find that hard to believe. and with regards to things like identify structures of acids, the students who prepare well would have...

maritime project thingy yeah i dunno about that one. i know its used as a dehydrating agent but dont see how it can be used as a catalyst, i.e. in speeding a reaction such as esterification.. HELP

yes, yes there would be

great notes dreamerish! thanks a bunch :D

im sorry but i dont follow what u are saying there rnitya... my question is in the second part: assess effectiveness of steps taken to alleviate problems, do we talk about the effectiveness of steps taken to alleviate ozone depletion itself (e.g. less use of CFCs, introduction of HCFCs, HFCs...

ok. this is where i wanted to get upto. Now that i know that the problems associated with the use of CFCs mainly concern ozone depletion and its effects, i move to the second part of that dotpoint: assess effectiveness of steps taken to alleviate these problems so alleviate ozone...

ok, the syllabus dotpoint: discuss the problems associated with the use of CFCs and assess the effectiveness of steps taken to alleviate these problems when the syllabus says these problems i am assuming they are talking about the problems that are to be discussed in the first section...

i know they are in the core.... i meant are those the only experiments that are in the website for the core lol

cool. but are those all the experiments in the core? i dont do forensic. :(

hokkai. i might just do that. see what they say... wasnt there a past hsc question in 2003 or something about assess the reliability AND validity of the .... implying that they were two distinct things... *sighs*

yes it is indeed. we never relli did it in class either. our teacher slacked off towards the end a bit :p too busy i guess :(

can anyone pls give a conclusive definition of these BOS terms...reliability and validity of an experiment. in my opinion, validity means the correctness of your procedure...i.e. whether you conducted the experiment in the right way and reliability i think is the dependability, i.e. are...

find the limiting reactant of the two reactants by finding how many mols of NO and how many mols of O3 are given to you. Use the lesser one, the limiting reactant as the basis for all ur mole calculations. Then, u will know the no. of mols of NO2 that are produced from ratios. one mol of gas =...

i thought bio stayed the same too... @_@

dont u mean breathing in carbon dioxide?

there isnt any quick fix method to remembering how to identify... my suggestion is that u first remember the solubility rules roughly. This itself can help you in many situations to determine what cations and anions are present in a solution.. then once you know that, check out conquering...

im not too sure about this one... are u sure those are the half equations for the electrolysis of copper chloride?

planck is incorrect. it would have to be einstein. einstein was the one to provide a 'real' explanation of the photoelectric effect. classical physics was unable to explain why below a certain frequency (now known as threshold frequency), light could not emit photoelectrons. But einstein used...

yeah i see what u mean, but its just the way they worded the dotpoint that confuses me. i would have thought it would have been a delicate balancing act involving, say, the compromise between reaction rate and reaction yield...which are influenced by factors such as temperature, pressure...