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Does anyone know CodeBlue's email?

re: HSC Chemistry Marathon Archive Yeah, I need to read the question more carefully. Also, I get what you're saying man and I understand there would be no current but why would there be no voltage? Wouldn't there still be a EMF between the two cells? Or actually, is there no voltage because...

re: HSC Chemistry Marathon Archive lol I just saw the white texts. Question though man, are those actual observations, besides the first one to do with voltage? Also, why exactly is there no voltage (I have an idea just want to know what you think)?

re: HSC Chemistry Marathon Archive Yeah, that makes sense. I just assumed the first half-equation was preferential. Thanks man.

re: HSC Chemistry Marathon Archive At the anode: Mg(s)->Mg^(2+)(aq)+2e The electrons liberated through the oxidation of the magnesium electrode migrate to the cathode through the external wire where they reduce the Fe^(2+) ions in solution.

re: HSC Chemistry Marathon Archive From the formed iron Fe(s)->Fe^(2+)(aq)+2e. I showed it in my previous answer here: Corrosion of iron Oxidation half-equation: Fe(s)->Fe^(2+)(aq)+2e Reduction half-equation: O2(g)+2H2O(l)+4e->4OH-(aq)

re: HSC Chemistry Marathon Archive I thought the iron came from the Fe^(2+)(aq)+2e->Fe(s).

re: HSC Chemistry Marathon Archive I couldn't think of any other points so I just put down ones according to my option topic Shipwrecks and Corrosion lol.

re: HSC Chemistry Marathon Archive a) The anode is the magnesium piece of metal and the cathode is the carbon (graphite) rod. b) A salt bridge is required to complete the circuit in a galvanic cell and to maintain electrical neutrality in the electrolyte solution of each half cell allowing for...

re: HSC Chemistry Marathon Archive Yeah thanks. New question: Why is polystyrene rigid?

re: HSC Physics Marathon Archive Can someone mark my answer to this question: How did Einstein's theory of special relativity and his explanation of the photoelectric effect lead to the reconceptualisation of the model of light? Here's my answer: Prior to formulation and popularisation of...

re: HSC Chemistry Marathon Archive Will do, thanks.

re: HSC Chemistry Marathon Archive Yeah true, you could have the hydride ion H- with an oxidation state of -1. So what do you recommend I say instead?

re: HSC Chemistry Marathon Archive Haber process: N2(g)+3H2(g)->2NH3(g) delta(H)=-92 kJ/mol Since nitrogen on the left hand side of the equation is in its elemental form its oxidation state is zero as is the oxidation state of hydrogen for the same reason...

Why do CFCs and HCFCs have low to no solubility in water? Thanks

Re: MX2 Integration Marathon Thing is though, by dividing by x at the bottom and bottom then applying x=sqrt(x^2) we are assuming that x>0. So we've restricted the integrand to x>0 I think.

Re: MX2 Integration Marathon I got ln[(x+(1/x))+sqrt[x^2+(1/x)^2] + C

re: HSC Physics Marathon Archive Can someone mark my answer to this question: Scientists have tried to explain observations of black body radiation using classical wave theory then quantum theory. How does quantum theory satisfactorily explain BBR? (3 marks) My answer: Classical wave theory...

What? Doesn't English always count?

What are their limitations? Also, why is it that BaCl2 emits a yellow flame whilst Ba(2+) is supposedly meant to give off an apple green flame? Thanks guys.