chemhero

Ah, i didnt realise ther was an introduction thread (my eyes dont spot the top threads right away, force of habit from using other forums)

Matt

I believe hydrogen sulphide (H2S) is involved?

Matt

Really? Perhaps what I used was something else then. Definatly gave off chlorine when i mixed it with lemon juice. It was Ajax, as a solid powder (make up with water, makes floors all nice and clean and disinfected)

Apologies!

Matt

So in my lectures this semester I've been taught about Cytochrome C. What a marvellous enzyme! Reminds me of motorcycle couriers, shuttling electrons from one place to another.

Ok, what gets me is this: how does the electron (bound to the Fe (II) of the haem) get from waaaay deep inside the enzyme to the substrate? I've tried to find papers on this, but theres nothing concrete out there. Its been sugested to me that the electron travels through a small "channel"; this just dosnt sit well with me. It would make more sense to me if the electron was somehow "passed along" the protein chain, so to speak, until it gets to the substrate.

Hmm

Matt

Hi everyone! I'm new here. I've posted a few replies in the chemistry section already, but thought I should formally announce my arrival.

Just a little about me: I'm a third year chemistry student studying in the UK, on an integrated masters scheme. Next year I'll do my dissertation / project whatsadodit which im really looking forward too, since theres a few options for me since I have a some interests!

I hope to learn a little while I'm around here, and I apologise in advance for wrong answers, misinformation and lack of knowledge!

I hope to spread my enthusiasm for chemistry unto you all, and receive enthusiasm for other subjects while I'm here too!

Cheers,

Matt

Why does transfering heat from a cold object to a hot object violate the 2nd law of thermodynamics?

Think about it - heat from a cold object to make a hot object hotter

Dosnt seem right does it?

Energy dissipates out, this way the overal entropy of the universe is higher and we are closer to the inevitable doom

Matt

Look for stuff on bone structure too, particularly hydroxyapatite

Wikipedia is a great source of information, but do remember its easily edited and therefore corrupted, so dont trust everything. Read it, seek a few other sources (journal papers are a good place) and build up your own conclusions.

Matt

Here's an easier way:

Take some bleach (perchlorate) and some acid. Mix, and collect gas.

Matt

You mean...will it be a crystalline latice (atoms all connected by covalent bonds like in diamond) or wil it be a molecule with the atoms held together by covalent bonds (like chlorine, CL2)?

Matt

I Did try and give you a Hint in my post too, say "Silly con" out loud

Dont be so absurd! No one will understand such an ambiguous hint!

Matt

How much do you kow about acids? (just so I can decide how to help!)

Matt

Well i'll be a little helpful, since its my first post. These questions can be answered if you take a little time to study the periodic table, and consider some of the bonding going on. For instance, the first question you ask regarding the valency of bonding for SO2, how many bonds are there between a sulphur and one oxygen? That sort of thing.

Give it a little thought, go through your notes and look in some books, and get back with what you think the answers may be.

Good luck,

Matt

(p.s you seem new to chemistry if this stuff is a little difficult to you? Dont worry, I couldnt get anything at first!)