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Oh, that was for Nit or Ragerunner. (Congratulations, Nit. I'm seething with jealousy. :() One hour sounds good as long as you're understanding what you learn in class. Use the syllabus well, and don't miss out on pracs! Thanks, and good luck with the HSC course. ;)

Oh don't worry about it. :p Look at us! We have our Chemistry HSC in a few days! Just because you're not learning it in class doesn't mean you can't do it at home. Grab yourself a textbook and read a couple of chapters each day. Read back every now and then to make sure you're taking it in...

I don't think it would make too much of a difference. The CO2 would still escape, maybe at a slightly lower rate.

Writing in caps halves the chances of someone stopping to read your post. No need to shout now. I believe your situation was resolved two pages ago. Both of you lost a friend. It's sad, but that's it. Say any more and we'll only repeat ourselves.

You're right. There's nothing wrong with that. I was talking to the guy who was going there ready to chat all the girls into bed. :rolleyes:

Please explain why. You seem to be making a lot of these funny little comments which you don't back up. I don't find them stupid though. I find them hilarious. :rolleyes:

Why ask if you're already convinced you're right? You give me no choice but to quote from textbooks: Conquering Chemistry: "For example cobalt-60 which is used for cancer treatment is made by placing normal cobalt-59 in a reactor where it captures a neutron." - Section 3.11, page 78...

CuO + 2HCl → CuCl2 + H2O n = m/M n = 8/(63.6 + 16) = 0.1 The molar ratio of CuO to HCl is 1:2. Therefore 2 x 0.1 = 0.2 moles of HCl is needed to react completely with 0.1 moles of CuO. The concentration of HCl is 2 mol L-1. This means 0.2/2 L is needed. 0.2/2 = 0.1 . ...

These are from the second edition of CC, yes? They have answers at the back if you want to check. a). 2Mg(s) + O2 → 2MgO n = m/M n = 0.5/24.3 = 0.021 12.4/0.021 = 602.64 kJ . : ΔH = -602.64 kJ mol-1 ( "-" because it's exothermic) However, in the equation above, we have 2...

I don't get your question. :p I do it by logic. I write the equation, then below the product or reactant relevant in my calculations, I write the mass/volume, and the number of moles present.

The equation of the reaction is: Mg + 2HCl → MgCl2 + H2 We have 1 g of Mg reacting with excess HCl. n = m/M = 1/24.3 = 0.04115 The molar ratio of Mg to H2 is 1:1. Therefore with every mole of Mg, one mole of H2 is produced. This means for 0.04115 moles of Mg, 0.04115 moles of...

Are you asking a question or making a statement? :p If it's the latter, you're right. Except it's at 20ºC.

Will you please get over it? I think I did say in my previous post that it doesn't matter if she has typos, but deliberately typing long sentences without separating them and using "2" for "to" (and other abbreviations) makes her posts more difficult to read. Gosh, talk about milking one...

Hey, I never insinuated I wanted perfect spelling and grammar. We all make mistakes, but when we deliberately type huge chunks with numbers replacing words and impossible abbreviations, it's really very difficult to understand. My point is, whatever mistakes she makes are mistakes - who...

Fe-27? The atomic number of iron is 26, and the atomic mass is around 56. Yes, the extra neutron does split into a proton and electron. That's why cobalt-60 is radioactive. Cobalt-60 exists only temporarily before it decays.

No it wouldn't. Write the equation. The charge of a neutron is 0. 5926Fe + 10n → 6026Fe If that does happen. I haven't seen any radioactive iron in the course. Anyway, you can't go up an atomic number because bombarding with neutrons changes only the atomic mass.

Just a tip. You don't lure females like you lure cats with milk. We're much, much smarter than that. Also, for your own good, don't get your hopes up on sleeping with hot chicks. Sluts are usually desperate and unattractive, and good-looking girls probably already have boyfriends. On top of...

If the n : p ratio wasn't out of ratio, then it wouldn't be radioactive, would it? :p You're right. Cobalt-60 decays to form nickel-60. But it has to be cobalt first.

Cobalt-60 is made by bombarding cobalt-59 with a neutron. 5927Co + 10n → 6027Co

You missed quite a lot. Most of the watermelon heads aren't Asian. Actually, I don't think any of them are.