how is medical oxygen different from industrial oxygen, like for welding?
406844
Medical oxygen probably has to be USP (United States Pharmacoepia) grade, which means there's a long list of things it can't contain.  It might also have to be dry, but I'm not sure on that one.
573947
Oxygen aton as such called as "Nascent Oxygen". It is highly reactive and powerful oxidising agent.\n\nO2 is oxygen "molecule"... the roperties of this will be different than "Nascent" Oxygen!\nGood luck with u r school project!
372603
Its got nothing to do with oxygen, that theories been scientifically disproven. But i dont have another answer, sorry
952154
Their is more Nitrogen in the air than oxygen, because it is a very stable molecule (N2), it takes a lot of energy to react nitrogen gas with respect to Oxygen, oxygen is very reactive, (it is an oxidizer) so  a lot of reactions can happen  (ie. rust forming or combustion reactions) it is also good to note that because of this, that oxygen is the 2nd most abundant element in the earth's crust primarily found in mineral form (i.e. silicon dioxide = sand)
334585
It is the sponsor, O2, they are a mobile phone company (part of British Telecom), so yes, I guess it does stand for Oxygen, but not necessarily in this particular case.
737804
First, you cannot directly compare partial pressure of oxygen in the lungs to oxygen in the blood since the phases are different (gas in gas vs. gas in liquid).  You can use Henry's Law to get a value that you can directly compare\n\nP = H * X\n\nAnywho, the partial pressure of oxygen in the lung is higher than the "partial pressure" of oxygen in blood.  Becuase of this, there is a driving force from the lung to the blood which causes oxygen to diffuse into the blood.\n\nThe exact opposite is true for carbon dioxide, meaning CO2 leaves the blood and goes to the lung to be exhaled.\n\nRespiration is cool!
106182
Actually its MgO. Magnesium is a bivalent metal Mg(2+) and Oxygen has a charge of O(2-) so they form a very strong 1:1 bond.
663852
you can give this a try :)\n\nwww.aarc.org/headlines/home_oxygen_issue/letter.html
44867
"In recent years, electronic testers have become available for analyzing flue gases. [...] Most electronic testers use an electro-chemical cell as the gas sensing element. A different cell is required for each gas being measured.\n\nThe most common sensor used in oxygen testers is a zirconium oxide element that develops a voltage difference across two sides if there is a difference in oxygen concentration. The zirconium oxide element has the advantage that it can be exposed to flue gases for thousands of hours."
161252
Welders use plasma arcs all the time to cut metal\nyou could probably go see this in action at \na body shop, exhaust repair, or steel fab plant\nor even at your school possibly
419127
The abbreviation for Oxygen is O2 (O subscript 2) because it is diatomic, which means that you find 2 oxygen molecules together naturally.
1179821
Molecular oxygen is paramagnetic, yes.
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.
191936
dioxygen is the most common molecule that contains oxygen.  \ncarbon dioxyde, for example has two oxygens and one carbon molecule.
304368
More rapidly than oxygen?\n\nBecause it's dissolved in the blood, and only has to move down the concentration gradient.\n\nOxygen has to bind to hemoglobin, so it takes longer for your blood to "fill up" with oxygen than it does to "empty" of CO2.
827009
You could write something amusing and clever about the flavored oxygen available in Oxygen bars, where you can buy Oxygen instead of beer.  "Oxygen, can't LIVE without it!"  (1) \n"Portable oxygen available for your dance party!  Not just for geriatrics!" (2) \nYou could say:\n"Get high on prescription flavored oxygen, but don't light a match or you won't be able to LIVE because of oxygen!" See article source (3) \n\nWhat a fun assignment!  So many possibilities!
1112892
Liquid oxygen is oxygen in liquid form. It is used in hospitals as a mix gas by anesthesiologists. The pure oxygen is mixed with other gases that put you to sleep because without oxygen you would die. It is liquid because they compress it (cool it) until it changes into a liquid state. It makes it possible to keep more oxygen in a smaller container. That means less trips for more o2. Some think it is used more for cryogenic storage but that is usually not the case at hospitals. It is highly flammable and not very safe for use as a storage medium. Liquid nitrogen is usually used for that. On a side note, the bottle you saw it stored in is just like a thermos you would use for coffee or a cold beverage. It is basically a big insulated bottle with a lot of plumbing in it.