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re: HSC Chemistry Marathon Archive Under exam conditions I would of still went with c because element 118 is in group 8, and all elements in group 8 are noble gases, hence c.

re: HSC Chemistry Marathon Archive First one is A because the oxidation state for oxygen and hydrogen never changes, they will always remain as -2 and +1 respectively. Also carbon did oxidise if you look at the oxidation states Second one is C because element 118 fits in the final group on the...

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I believe there are questions that require you to prove ratios of lengths initially and using the sine rule, to prove the reflection property

He is saying you are integrand's alternate account

I believe most holiday programs have already started today, so im not sure if it is too late to even recommend any

re: HSC Chemistry Marathon Archive Why not just go straight to the confirmation test and add iodide ions? If this was a question, I would just say add KI, and if a yellow precipitate forms, then lead is present since that is only ion that precipitates that colour.

Re: 2015 HSC Economics Marathon There is something called Google. Here is the link to what it is: https://en.wikipedia.org/wiki/Dual_labour_market I doubt it will be asked in the HSC

Re: 2015 HSC Economics Marathon I got 1200 for income and multiplier was 4. Its because: Y=C+I Therefore, Y = 200 + 0.75Y + 100 0.25Y = 300 Y=1200

Bump, im only coming for the free subway [emoji14] inb4imnotallowedtocome

re: HSC Chemistry Marathon Archive Lol not sure why you would be titrating a base with another base, so that isn't a valid point. The reasons are because: -its hygroscopic -low molar mass -its hard to obtain in pure solid form in order to the measure mass

Re: MX2 2015 Integration Marathon Still not working, the link is apparently invalid

Re: MX2 2015 Integration Marathon Just a heads up, you can reduce 3u^3/(u^6+1) into 3/2 * x/(x^3+1) by letting u^2 = x, so it would be a little more cleaner.

YES! We might have someone who will break the 70 barrier!

Wrong thread mate

re: HSC Chemistry Marathon Archive That's what I said. concentration is proportional to 1/volume. Meaning that an increase in volume results in a decrease in concentration and vice versa.

re: HSC Chemistry Marathon Archive Depends on what definition of volume you are referring to. When you talk about the volume-pressure relationship, volume refers to the amount of gas in the container. However when you talk about the volume-concentration relationship, volume refers to the...

Re: 2015 HSC Economics Marathon Yeah its all in the name lol. All these MER's and Labour Market policies have obvious names; Competition policy, Innovation Policy, Trade policy.

Yeah I got that as well. The mistake in drsoccerball's working out is in the 4th line.

That moment when you are the first one to pm, and you still haven't got your student number yet...