ChemistryThe science of substances, elements, compounds. No bombs please!
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Very nice videos!
I really like the sulfur hexafluoride. I've been trying really hard to find some for quite a while now, because I've always wanted to experiment with it... but no such luck. Looks like fun stuff though!
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I liked #8 the best because disintegrating gummy bears, or anything else, is always fun.
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--- "There are no passengers on Spaceship Earth. We are all crew." - Marshall McLuhan
"We must not forget that when radium was discovered no one knew that it would prove useful in hospitals. The work was one of pure science. And this is a proof that scientific work must not be considered from the point of view of the direct usefulness of it." - Marie Curie
The one that got the biggest reaction out of me was Sodium and Water in Chlorine Gas, but I also liked the Meissner Effect and Sodium Acetate Super Saturation. And Superabsorbent Polymer and Floating on Sulfur Hexafluoride...
I think we all agree that the Sulfur Hexafluoride one was absolutely cool amongst all cool things....
Let's do some chemistry with it. The average molecular weight of air is 29. SF6 comes in at 146.60 or 5.10 times as dense as air . (A molar volume is a molar volume, 22.4 liters at STP.) Can we do better? Sure! Make something volatile by perfluorination and symmetry (removal of dipole moment). IF7. bp = 4.77 C, colorless gas. MW = 259.89 or 8.96 times as dense as air. It's smelly, reactive, and toxic. Can we do better? Sure!
US Patent 3992424. Take your perhalogenated whatsis-X, microwave plasma with F3C-CF3, swap partners to get whatsis-CF3 and CF3X. I(CF3)7 is perfectly reasonable and most likely gaseous at room temp or slightly above. MW = 609.95 or 21.03 times as dense as air. A two-liter bottle of air contains 2.6 grams of air (piffle) or 54.5 grams of I(CF3)7 - and that's perceptably heavy. U(CF3)6 is "a very volatile solid," MW = 652.
My favorite chemical affect was performed by my freshman chemistry professor. It was called the beating heart experiment. A blob of mercury is placed in a dichromate solution with a little sulfuric acid. The mercury is touched with a nail. The mercury started to beat like a heart. It can do some morphing between shapes.
It was called the beating heart experiment. A blob of mercury is placed in a dichromate solution with a little sulfuric acid. The mercury is touched with a nail. The mercury started to beat like a heart. It can do some morphing between shapes.
Out of your almost 1800 posts here, this one has got to be your most coherent and cool. Thanks for the neat video. Perhaps I would enjoy your posts more if you used fewer words and more videos!
Astronomical instruments needed to answer crucial questions, such as the search for Earth-like planets or the way the Universe expands, have come a step closer with the first demonstration at the telescope of a new calibration system for precise spectrographs. The method uses a Nobel Prize-winning technology called a 'laser frequency comb', and is published in this week's issue of Science. Read » | 0 comments
Stanford computer scientists have developed an artificial intelligence system that enables robotic helicopters to teach themselves to fly difficult stunts by watching other helicopters perform the same maneuvers. The result is an autonomous helicopter than can perform a complete airshow of complex tricks on its own. Read » | 0 comments
Chemistry is Cool!! 
And that's just the sulfur hexaflouride
