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lol i use to have a teacher who was just "library period" every lesson beca use the internet was "a wealth of knowledge" but its a good thing i had him because it made me realise i had to go to other people's classes to learn anything

it forms a buffer with carbonic acid i doubt you'd ever have carbonic acid lying around and theres no point in buffers to chemical spills if you spilt sodium hydroxide, you dont want to keep the place basic

yes see industrial chem topic for more information cbb retyping it

i rote amphoprotic-2eq solid-rather than liquid-can be contained weak base-compared to naoh, can be used in excess stable, can be stored disadvantages-more expensive then sodium carbonate than evaluation

lol i misread the q about thought they wanted isotopeS for both industry and medicine so i rote down 2 for each so i ran out of space and had to ask for a new booklet dodgily attached it on i wish tehy would make it like the options where u just rite down the question number then you can...

lol i used "luke"

i thought it was a very hard test all the past hsc ones i did i finsihed with like an hr spare but this one i only just finished (2 minutes to go) i thought it was harder than most of the past ones (except 06) but my chem teacher and lots of my friends said it was very easy so dont know...

model means not a real equil. experiment the no2 one is not a model its an equil itself the one i used was 2 measuring cylinders and 2 pipettes transferring water from one to another im not sure but because it was divided up into 3 q (2marks 1mark 3 marks), if you did not write about a model...

"Paper 1 is out of 45, Paper 2 is out of 60. So whatever mark you get for the exam is out of 105. Then divide that total mark by 105, and then multiply that by 100. The end result from this is your exam mark." actually the 45 is converted out of 40 and then added to the 60 (paper 2...

convert the paper 1 mark to 40 and add the paper 2 mark to it you need roughly 85 (17/20 is cut-off for top band)

min, max wwi: 20-23 russia:22-25 trotsky: 18-21 indochina: 18-22 total raw: 78-91 halfway is about 84 although max is very optimistic ill prob get 82-83 85-86 if very lucki