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re: HSC Chemistry Marathon Archive idk why it was cut down anways im off cya

re: HSC Chemistry Marathon Archive Mine had, draw a LINE (lol)...(if the volume of the reaction vessel is doubled)

re: HSC Chemistry Marathon Archive I THINK....... because my teacher usually buys trials.......................... let me see the question again.... (and then modifies the test by removing/adding questions)

are u sure?

re: HSC Chemistry Marathon Archive Mine said something like this: "Discuss the basis of the claim that ethanol can be a 'carbon neutral' fuel" (3 marks) A lot of people got 1-2 marks

re: HSC Chemistry Marathon Archive @AnimeX - well done on the solution, its correct! oh dw about the trial, do actual HSC or something, its way better. The trial i did in school had like citric acid titration, arguments for and against for 'carbon neutral' of ethanol, and some other stuff...

re: HSC Chemistry Marathon Archive It my school's trial paper so where the question was from (either trial hsc or actual hsc or they made it) post up ur working out! (i encourage others to try it aswell), who cares if its wrong, u will learn how to do it correctly anyways!

re: HSC Chemistry Marathon Archive dont bring in physics...

re: HSC Chemistry Marathon Archive The biopolymer biopol can be produced from a culture of bacteria, namely Alcaligenes eutrophus or Ralstonia eutrophus, fed with high carbohydrates and valeric acid with restriction to nitrogen and phosphorus compounds. The polymer is stored as excess energy...

re: HSC Chemistry Marathon Archive Correct, this was a multiple choice question (but if it was a short answer question, idk about the gamma radiation, it is right but not everyone will know it) The question was "Explain why HCFCs have a lower ozone depletion potential compared to CFCs" so he...

re: HSC Chemistry Marathon Archive yeh

re: HSC Chemistry Marathon Archive sorry it should be 2 marks yes but u didnt identify the difference between CFCs and HCFCs bolded - i think that is wrong

re: HSC Chemistry Marathon Archive yep Question: a) Identify the difference between CFCs and HCFCs (1 mark) b) Explain why HCFCs have a lower ozone depletion potential compared to CFCs (1 mark)

re: HSC Chemistry Marathon Archive Question: Compare the reactivity and solubility of ozone and dioxygen

re: HSC Chemistry Marathon Archive yes, and also for Q2 (b), the catalyst used lowers the activation energy for the reaction to proceed, thereby increasing the rate of reaction

re: HSC Chemistry Marathon Archive Check the bolded

re: HSC Chemistry Marathon Archive Question 1: In a nuclear fission reactor iron-58 is bombarded with neutrons. Iron-58 forms a new isotope of iron. This new isotope then undergoes beta decay. Identify the new product after this beta decay (1 mark) Question 2: a) Identify the catalyst used in...

he said it all

NH4+ is a special one and does affect the equilibrium

Re: HSC 2013 4U Marathon thanks! i now understand