hypervalent_iodine

You're not really interested in grams of silver nitrate, you're interested in the number of moles of Cl- that were required to react with all of the AgNO3. This is not a limiting reagent question, this is a volumetric / gravimetric analysis question. Limiting reagent questions are usually given where they provide the masses / volumes of two things in the equation. Here they have only given you one, not including the initial sample mass. Studiot has kind of skipped to the end of the question, which doesn't help you in the initial stages. Some key points that might help you make sense of it: The 2.017 g of solution is a solution of the chlordane, but it doesn't just contain chlordane. It might also contain water, or some other solvent. It doesn't matter what the other stuff is, so long as you can recognise that only some percentage of that 2.017 g is chlordane (that is what the question is asking about after all). The question has asked you for a mass percentage of this compound in the solution, which means you have to find the mass of chlordane in the solution at some point. If you have the molecular formula, you can calculate the molar mass, but you are still missing one key number (what is it?) All of the chlorine in chlordane was turned into Cl- and reacted with AgNO3 in the equation that you correctly identified. You know that the molecular formula of chlordane is C10H6Cl8. If you know that all of the Cl- used in the reaction came from chlordane, and you know how many atoms of Cl there are in one molecule of chlorine, then you should be able to calculate that key number I mentioned in point 1.

A good idea. In that vein, Blue89, this is one of your posts translated into Turkish. Tell me if it makes any sense to you / reads well. I'll admit that it is one of your more sensical posts, but it is far from being passable. Edit: another one.

! Moderator Note Let's please get back on topic (whatever that is; it's definitely not DrKretin's supposed offences). blue89, please do not accuse members of things that they haven't done. It is dishonest. If you believe that he has insulted you, report the post you deem offensive and let staff deal with it. Any more hostile posts towards DrKretin will be removed. Do not repspond to this note within the thread. PM staff or report this post.

Into the trash you go!

It really depends on what interests you. High school chemistry typically involves learning about (initially) trends in the periodic table, naming of compounds, types of chemical bonds, properties of different classes of substrates, stoicheometry, simple reactions between different classes of compound, atomic structure, and electronic configuration. Later you might then go into thermochemistry (exothermic and endothermic reactions, Gibbs free energy, spontaneity, calorimetry), electrochemistry, rate laws, equilibrium (as that applies to normal reactions, acids and bases, and solubility), nomenclature of organic compounds, trends in physical properties of simple organic molecules, and some organic synthesis. I may have missed some things, but these are the majority of topics that I have encountered with my high school students over the years (through private tutoring). Note however that I am in Australia, not Canada. It may not all apply to you.

! Moderator Note I'm closing this pending some further review. Since we don't allow threads that aim to preach, and the OP left little open to discuss, I don't see how this thread has any point.

Why are you trying to make strychnine?

! Moderator Note I have hidden a number of posts in this thread that were off topic. A reminder also that we discourage the use of the word, 'retard(ed),' on this forum. There are no instances where using it to describe something that is bad or stupid is acceptable.

Good point. I work in a lab under the supervision of someone who point blank refuses to publish on work he thinks might be able to get patented until after its gone through that process, so that's always been my mentality. You still didn't answer my question.

Then perhaps you could tell us what you want this thread to be about?

Over9000 was apparently not done with his holiday, so we've extended it a further 7 days. We hope this time around that he may learn some decorum (and maybe some biology).

What?

You can publish and patent, but the latter must come before the former. It will be very difficult to get your work patented if it's been shared around on the Internet, however. blue89, no one is trying to cause offence, they are merely making observations about your English. It is not good. Your spelling is better than your grammar, however much of what you say makes too little sense for that to even matter. The response you posted from Nature looks to me to be a generic response. I doubt they looked at your manuscript in any great detail. What is it that you want from this thread? Money? This forum is not the place, and staff will have to lock this thread if that's all it is. Otherwise, please clearly outline your questions and / or points for discussion. Thus far you have not made anything very clear.

I have already answered part of this question in my last post: yes you can, but is tricky to get the platinum to adhere. Why are you choosing to make it instead of buying it?

Why do you have to choose between the three? And what level are we talking? Senior high school? College? Also, I would not say biology is any easier than the other two. I think that you can intuitively relate to more of what is taught than you might do in other sciences (to a point), but it is not necessarily easier.

! Moderator Note Can we all please return to the topic of the OP? Discussion about the wider education system do not belong in this thread.

It is definitely possible, and something that is done quite regularly; to the point where you can actually buy platinum plated titanium. I am not sure of the salts, but I am pretty sure that adhesion of Pt to Ti is quite tricky. Are you aware of this, and is there any reason you wouldn't just buy the pre-made stuff?

! Moderator Note Tom O'Neil, You have been told previously not to use this forum to advertise or drive traffic elsewhere. I have hidden the offending post and your most recent thread.

! Moderator Note The only responsible advice we can give is to see a doctor. Medical advice over the internet is not something that we choose to indulge in. I do wish you the best in sorting things out.

! Moderator Note It matters because the question in the title has to do with the evolution of race, and there is debate within this thread as to whether race is a construct of society or of biology. The science on the subject is very much in support of the former. Incidentally, I am happy to suspend you as well if you continue down the path of insulting members rather than offering up intelligent discourse on the matter. Do not respond to this mod note within the thread. Please report the post or PM a member of staff.

It is cheating if it's assessable homework. The point is to determine your ability to do the work, not someone else's. Can people who mark your work weed out cheaters? Sometimes. If you have big classes it can be hard to detect things like collusion. Sometimes students will make it easy by making the same bizarre mistake, or by posting the question word for word online (not realising that the coordinators check and that numbers given are student specific). In one case I saw, there were two people who plagiarised off one another in an essay to the point of using the same cover sheet, and by an unfortunate coincidence, happened to be next to each other in the pile of alphabetically sorted papers from a class of 1500 students. Point being that often the only cheaters who are caught are the ones that cheat badly. As to your original question: there is obviously a benefit to seeing a worked example of a problem for the purpose of learning. However, homework is designed to test your abilities and help you learn by doing, not by seeing what other people do. I can tell you from my experiences in teaching that students who only want you to show them the answer never learn how to come to the answer themselves.

It is definitely possible to synthesise it (the link I posted should help), but if you are unfamiliar with the process or techniques used you may end up spending as much as the block copolymer costs in time and materials attempting to make it (not to mention the huge risk you invoke in performing reactions with no experience). Synthetic chemistry is a harsh mistress. Are you in any way familiar with organic chemistry in a technical sense? Is your lab equiped with the proper hardware for the synthesis? Is it possible for you to collaborate with a group that works in polymer synthesis to help you out? ------- Oh, one other question. Have you looked anywhere besides Sigma? Their prices are often terrible.

There's really not a lot of help anyone can give you with such a vague question. This website is a good starting point though: http://www.cmu.edu/maty/materials/Synthesis_of_well_defined_macromolecules/block-copolymers.html

There are a great many that have the potential to do this. However, if used properly and with due care, there should be minimal risk. Yes, the effects would be permanent. Why do you want to know? It may help to better answer your question if we knew why.

NaCl is water soluble. It shouldn't cause a blockage. Vinegar and baking soda is actually a very common method. It's cited quite often on a parrot forum I visit as a safe alternative to some of the more smelly options that would otherwise kill a bird. I believe the heat generated in combination with agitation from the bubble formation is what does it.