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I'd say 83.

Yeah ok nah, i just had a look over this years exam, it's easier than last years.

Doubt it, maybe though.

3 for correct axes and APPROPRIATE spacing of units (graph should fit most of the space) and 1 for the graph itself. Seems reasonable to me.

It's probably a mistake in the question/ bad chemistry on HSC's part then. Since you get 10 if you do it at 1L and 10.6 at 2L for change of 0.36

That too, but they gave that the change was 2x=0.36, and it didn't actually say it was at equilibrium at 1 L.

Draw u ice table, change in h2 is 2x=0.36, so x=0.18 change in methanol is -x change in CO is +x. Final mole for H2 is 0.5+0.36, For CO it's 1+0.18 and Methanol 2.5-0.18. Divide all these by 2 because final volume is 2L to get concentration. Then just plug into the K expression.

It's very possible HSC have dungoofed, it has happened before.

I think polymers need to have repeated sub-units by definition, might have to have this checked though.

Technically both B and D are wrong, but i think they'd accept D as more correct since it has repeated sub units, so i dunno. I didn't think it was B because it didn't have repeated sub units, which i believe is in the definition of a polymer.

OK for q11, answer might be B after actually having a think about it. If you consider something like say Cellulose, OH-(C6H10O5)-OH -> (C6H10O5)n +h20

I think it may be B, since D is actually wrong, but HSC never throw curveballs so i'm skeptical.

I got 10.6. And yeah, it's just your typical K calculation... I think it might want 11 (2 s.f)

Anyway though, it's not B, because by MC common sense

Everyone seems to be getting different answers for it lol

lead ion conc is just 0.13/MM(lead chloride) divided by 0.05 lmao

Again if anyone has it, the K question from Industrial that everyone's complaining about please.

Oh i meant they won't give you marks if you write a correct statement, but somewhere else you contradicted it.

Well this years MC was a dud.

Well it says of "THE pond water." So i'm assuming we're studying just that pond in the contamination site.