jdurg

Colored gases are pretty rare. Typically, when someone sees a colored gas, they are actually seeing a suspension of liquid/solid in a gas and not the gas itself. The only colored gases I know of are NO2, F2, Cl2, Br2, and I2. I honestly am not aware of any other gases that have any color at all.

No it isn't. HN3 is a liquid at room temperature and is very volatile. It would NEVER be used as an airbag inflater. You must have mean Sodium Azide (NaN3). That is a shock sensitive explosive used to inflate airbags. The downside is a small bit of sodium metal that is vaporized into the air, but that side effect is worth it for the safety that an air-bag provides. I had an airbag go off in a car accident I was in last June. Had a nasty sore throat for a few days afterwards, but my life was saved.

Also, many oils have large, convoluted (e.g. not-linear) molecules and these molecules will "lock" into each other and thus make the liquid more viscous than one would think. I mean, octane is pretty non-viscous but it is a larger molecule than water. When you start introducing double bonds and methyl/ethyl groups onto the chain, it makes it a little less easier for the molecules to move past each other.

Where do I base my prediction? Look at the cost of the materials required. Then look at the amount of energy released. If you overall numbers are positive, then it can be scaled up. The thing is, heavy water is NOT inexpensive. It requires a great deal of engery to generate, and the fusion reaction that has been proposed does not create enough energy to make the production of D2O profittable. It's like saying you can heat your house by reacting five ounces of platinum metal per month. Yes, you may be able to do it, but the cost associated is not putting you in the black.

I can fully understand your pain with the rising prices for commodoties, but you must realize that the companies can't just sit there with the losses and not try and recoup them. The company itself has a lot of employees to pay, benefits for those employees that need to be paid for, and various other costs related to being in existance. ANY industry that relies on fixed commodities can stand to lose their entire franchise if they don't have enough of a "nest egg" to fall on when the hard times hit, they won't be able to exist. So while it REALLY sucks that the prices have gone up and won't come down again, it would suck FAAAAAAAAR more if the companies producing ammunition all went out of business and all the people working there had to be laid off. It's almost like a necessarye evil.

Actually, small bits of "cold fusion" can happen. Hell, you can buy kits that allow you to do it in your kitchen. The thing is, there is absolutely NO WAY to scale it up to a level that produces useful energy in a way that releases more than it costs.

Yes, you are correct. Silver halides are very light sensitive and decompose into their silver salt, and the free halogen. (Though the free halogen typically binds VERY rapidly with something else to become fairly innocuous). The grayish/brown color you see are minute silver and silver sulfide (from the reaction with silver and sulfur-containing compounds in your skin) deposits in your skin. Unless you rapidly poured a LOT of the silver solution on your skin (which would be fairly pricey) you aren't going to have any ill effects. Silver ions are a VERY good disinfectant, and there are my "high-tech" products that have a fine silver thread woven into them to provide disinfectant/deodorizing abilities. (I've heard of boxer shorts having silver linings to disinfect and get rid of stench). AgNO3 (silver nitrate) was widely used to treat nosebleeds many years ago. It helped the wound heal, and disinfected it. The downside was that it left the silver/brown stain on your upper lip/nose and it eventually become too expensive compared to other disinfectants.

Incorrect. In a solution of H2O2, there will be enough O2 generated that the oxidize the copper a bit. In addition, H2O2 itself is a fairly good oxidizer. It would probably help to know more about the H2O2 concentration used.

I too am from CT and have read the laws on explosives quite extensively. What you have highlighted in the above quote just means "As long as what you have is an amount that can not possibly hurt you or property, it's okay to have". So for nitrocellulouse, it means that if you have a small amount of it that is not confined and can not explode, it is legal to possess. Therefore, if your intentions were to just see how quickly that stuff burns, a small patch about 1 square inch would be okay to own. Again, however, the manufacturing of it probably involves quite a few other laws as well. Your best bet is to call your local police department, or go there in person, and ask them. They may look at you as kind of odd, but more often than not if you show that you are responsible and not a lunatic, they'll be willing to explain the law to you.

Not really that dangerous. After two or three days in the sand with the rain that came down, the metal would not have any potential to explode. If he did this shortly after it had solidified, then yes, it would be quite dangerous.

One of the most glaring to me was in the movie "The World Is Not Enough". Yes, it's a Bond movie so I'm expected to suspend some reality, but when he brought half of a nuclear warhead of Plutonium to Elektra and said "Don't worry, it's safe." I nearly threw up. That much plutonium would be RED hot from the natural radioactivity, and everyone in the area would be toast. Then, the final battle taking place inside of an ACTIVE nuclear reactor had me wretching. It's a case of "ignorance is bliss" because knowing ANYTHING about chemistry and radioactivity made the movie unwatchable. Aside from that, it was a good movie. (If you also ignore Denise Richards being a nuclear scientist).

Take a look at the enthalpy, entropy, and temperature that the reaction takes place in. Activation energy is also important. If the overall Gibbs Free Energy is positive, then it is not likely to happen. (Yes, this is a VERY simplistic assumption, but it works enough to be useful).

Regardless, there's no real good reason to freeze wine. If you can afford a contraption to keep the wine completely frozen and store it for a while, you can afford to purchase good wines ad-hoc when you need it. Also remember that the price doesn't indicate a good wine. The taste does. I've spent a lot of money on one bottle to be very disappointed, only to spend a tiny bit of money on another to be VERY happy with it. There are many good places in your area to discover good wines. Regardless of where you are, there will ALWAYS be a location that will help you pick out a good wine. Remember, if you buy wine for cooking, buy something you'd drink on its own. A good drinkable wine in a dinner makes it MUCH better than a crap wine. When you cook with wine, the alcohol and "common" components tend to burn/evaporate off. The stuff that's left is what makes one wine different from the rest. So if you are cooking with it, you want the best wine you can get.

After the holidays, I actually had quite a few cubic feet of packing peanuts to dispose of. After reading this thread, I went and took a few tablespoons (if my memory and volume judgement serves me right) and had fun dissolving it. Haven't done that in a long time. Was quite fun, yet quite stinky.

I appreciate your intent to help out, but that post was completely and entirely unhelpful and can quite possibly add more confusion to the matter. "force" is not what the original poster was looking for. You can't hold "force" in your hand. It is not matter. The question had already been answered multiple times in this thread and the answer is "nothing". In between molecules and atoms is nothing. Empty space.

Good advice hermann. One needs to remember that chemistry is VERY complex, yet VERY simple at the same time. When one learns chemistry, they are typically taught very basic principles and concepts as starting out with quantum theory and the like will make it near impossible to understand. As a result, in the beginning a lot of "simplified" concepts are taught which need to be adjusted as your learn abou the more complex topics. Again, this is only so that you'll be able to learn it. It's not a flat out lie.

Ethyl mercaptan is the most commonly used odiferant for propane gas.

Very nice Hermann. It's great seeing chemistry and physics work. Those are beautiful samples, and even more beautiful because you made it yourself.

If you have the concentrated sulfuric acid, it would be easier to just dump some common table salt into there and collect the HCl that is driven off.

Yes. Take a look at the sun or any other star out there. They are very dense and also very hot. Therefore, walking in there wouldn't be all that possible.

It'd be damned near impossible to make any type of penetrating weapon out of sodium. It would be like trying to stab someone with a stick of butter. You're not going to be able to penetrate skin, let alone clothing.

Yeah. I have done it with concentrated NH3 in the H2O2, but using NaOH is probably better. The highly concentrated H2O2 will decompose any NCl3 that may form, but the NaOH is less "smelly" and easier to come by.

Yeah, there's actually a LOT of really neat chemistry videos on YouTube. These were demonstrations you used to only be able to see if you privilged enough to have a good teacher in high school.

In my experience, no NCl3 was formed since the H2O2 and evolution of oxygen quickly oxidized everything into various oxychlorides. But NaOH is a much easier method and less stinky.

That won't work because the little bit of nitric acid that you'll create will mix with the HCl leaving you with a very dilute solution of aqua regia which will readily dissolve gold. The way to make nitric acid without buying any is to take 98% sulfuric acid, dissolve some potassium nitrate in there, heat it up, then distill off the HNO3 that's produced. There are many videos out there on YouTube which will demonstrate this.