is air in a SCUBA tank a solution?
103755
it is a mixture not technically a solution. now if you are diving deep they mix nitrogen, oxygen, and hellium. i think it's called "trimax" i could be wrong about that name. the hellium helps keep your vision clear at deeper depths.
383470
Personally I use C02, but a Nitrogen tank is EXPENSIVE, but it gives so much more added volcity, Compressed air is simmilar to C02, expept you can fill it yourself if you have a special tank and compresser.
509750
Air is just a homogenous gas mixture, therefore you can make it if you dissolve all of the major components of air into a container. Or...you could run through millions of other experiments trying to release only certain elements in the container.
102988
Since Oxygen is a gas, it is less dense than water...hense it will float.\n\nIf you produced Oxygen underwater, as it is produced, it will buble up.  If you place some type of container (filled with water) above the bubbles, the Oxygen will collect there and displace (push out) the water.\n\nThis picture should give you the idea,\nhttp://intro.chem.okstate.edu/1314F00/Lecture/Chapter5/Gasoverwater1.GIF
39716
Well the cover is obviously restricting oxygen flow and they go out. I would put some holes around the bottom edge of the holder to get some cross ventilation going.
647325
self contained underwater breathing apparatus
834660
I don't mean to be contrary, but I think the previous answer missed the question, or device being described.  There are portable oxygen tanks, where the oxygen is generated back at a chemical plant, and just released.  Those need tank refills.  I think you want to know about the actual home based oxygen generators (not too different in size from a home electrical generator), that plugs into the wall, and never needs to be refilled, like the one my grandmother uses.  \n\nThese are often called "concentrators" instead of "generators", because they concentrate the oxygen already in the air.\n\nThese generators use air as the source, and enrich the amount of oxygen in the air, releasing the nitrogen and other components back to the environment.  The main method for doing this is by compressing the air, and leveraging the different physical properties for components within air (oxygen, nitrogen, etc).\n\nThe main components include a compressor (hence why they are inherently noisy), to push the air across membranes or sieves.  The speed of absorption through the sieve is different for different gases in the air.  The concentrator uses this to increase the concentration of oxygen, before it is delivered to the user.\n\nThey are pretty neat devices.
390672
having room for more oxygen, and other things for transport
1183144
By free diving, I assume you're referring to diving w/o SCUBA, or air supplied from the surface. A person who is preparing to swim under water may deliberately hyperventilate (deeply inhaling and exhaling) before taking a deep breath and submerging in an attempt to be able to stay under water longer. That desperate urge to breathe, to the best of my knowledge, is triggered by increased CO2 levels in the body, not by a lack of oxygen; and since hyperventilating reduces the CO2 level in the blood, the diver's urge to breathe is reduced. A serious problem can occur if the oxygen level in the diver's brain drops so low that the  diver blacks out underwater because he did not realize he needed air. If that happens, I can't see why a person woudn't run the risk of swallowing water.\n      In such a case, it seems reasonable that perhaps you'd treat them like any other near drowning victim, but since I'm not medical personnel, I wouldn't even begin to offer any advice. You may well want to ask your doctor about what to do or where to go for advice on this matter.
657224
Zeagle regulators.\n\nConsistently rated a top performer and top pick by Scuba Diving magazine's comparison tests, great factory support with free annual service parts if you buy from an authorized dealer, and dealers such as ScubaToys will match prices from grey market dealers.\n\nOf the Zeagle regulators, I prefer the DS-Vs.  Simple design, environmentally sealed, highly regarded by tech divers (similar to Apeks DS4).
1013381
This would be an awesome inexpensive experiment. as I believe that it does with respect to the diameter of the bubble gravity attraction should be increased with respect to surface area, however this experiment should be conducted in an environment free from draft and circulating air flow.
114066
Depends on the bubble.  If you are blowing bubbles in the pool, the bubbles are air.  But if you are making them with bubble solution, they are liquid on the surface, trapping the air inside.
648558
when scuba diving the object is to put enough air into your bouancy compensator(bc) to remain neutrally bouant at a point. so you wont sink or float anymore. its basically balancing out the pressure above you with the pressure below you by surrounding yourself with air. so if taken to a certain depth maybe a decomposing body would release enuff air to remain neutrally bouant at a certain depth.
44675
For starters, these bubbles are not coming from the oxygen present in H2O, or any transition from gas to liquid state. The amount of activation energy it would take to break the H2O bond (plus the surrounding hydrogen bonds) to send liquid Oxygen to gas form is not going to come from room temperature. More likely, the gas bubbles you see are dissolved air. Your water has gone through many filtration stops and a multitude of meshes, all of which can dissolve small microscopic bubbles of air in the water. These either come out to the water-air interface or combine with neighboring bubbles (I would guess this reduces surface tension). You see the larger air bubbles.
192080
Is it within a vacuum?\n\nIf not, and if through your above given conditions resulted in air being compressed or what have you then I guess it would.
810879
The problem is not the weight of the water, it's the drag of the fluid. Unless you can find some magic way to eliminate the drag in a fluid like water which is so much more than that of a gas, you will be stuck with lower speeds. Even if you had some "magic" bubble around the sub, you would still need to displace the liquid to move the bubble.
642661
Self-Contained Underwater Breathing Apparatus