Oxygen Definition and 360 Threads

I am trying to model the behavior of oxygen in water. However there is so little oxygen in water I don't think I could measure concentrations of it experimentally. Does anyone have advice on what I might be able to use as a replacement for oxygen? I need to find something (a gas?) that...

So, I was just fooling around on Google Translate, and I decided to translate from Dutch to English for no good reason. I typed in hydrogen, and got back waterstof. Water-stuff! Or alternatively, water-dust, or water-material. So, I thought to myself "Hey, oxygen is also in water. Let's...

Pressure Problem! Homework Statement Oxygen at pressures much greater than 1 atm is toxic to lung cells. By weight, what ratio of helium gas (He) to oxygen gas (O2 ) must be used by a scuba diver who is to descend to an ocean depth of 50.0 m? Homework Equations The Attempt at a...

Can atomic or nuclear bombs be detonated in space? There is no oxygen and I was wondering in an effort to deter an asteroid if they really could be used - do they need oxygen to work? For example would they work if you fired one to the moon?

Hi, I'm not a physicist. but I'm looking for the wavelengths of oxygen. I want to pump the electrons up to n=3 and I need to know what wavelengths given off from n=3 to n=2 and n=2 to n=1. I plan to use leds at those values to excite the electrons. If I had the books, I could calculate the...

I have a stupid question to ask you all. Let's just say that you shut your door, and then shut all your windows so there isn't any ventilation and stayed in your room for several days. Could you end up breathing until you've reduced the oxygen to dangerous levels?

I know that oxygen is necessary for fire to exist, but could there perhaps be another element that the combusting material could bond to? What is so special about oxygen? Couldn't the right conditions create a reaction similar to oxidation, but with a different element?

I have read this in many places that carbon or any fuel for that matter example methane when undergoes combustion in limited supply of oxygen forms carbon monoxide as a major product. Could anyone explain me why this happens? I mean why can't the carbon atoms simply react with the required...

Does anyone know a good resource that describes the physics of fire (not the album)? I understand the chemistry of it, breaking apart of hydrocarbons, and combining them with oxygen, but I have been trying to figure out what is actually happening on the atomic level. What is an "ignition...

Hello, A question about the devolepment of oxygen on Mercury: I learned that all the oxygen (O2) at our planet was formed by photosynthesis of bacteria. So how could oxygen develop on mercury without life?? (Composition of the atmosphere of Mercury...

Oxygen is flammable.But why don't we blow up while we were using a cigar lighter? I asked this question to my physics teachers..and the told me if the oxygen in air wouldn't be 23 percent we would blow up.This didnt sound true to me.What do you guys think about that?

Greetings. I've been reading papers on plasma kinetics and have come across the term "shape resonance" a few times when describing peaks in electron impact cross section (function of energy). I have seen calculations attempting to explain these for atoms like helium but I'm not sure how close...

1. The % of hemoglobin bound with Oxygen is different at high and low carbon dioxide concentrations when the partial pressure of O2 equals 0mm Hg True or false?? This should be false right...? if partial pressure is 0... Hb can't bind to any oxygen in the first place... is my reasoning...

Homework Statement Pure oxygen was first obtained in the laboratory by the French scientist Antoine Lavoisier in the 18th century by decomposing red mercury(II) oxide, HgO, to give silver mercury liquid and gaseous oxygen: 2HgO(s) \Leftrightarrow 2Hg(l) + O2 (a) From values of \Delta f...

Homework Statement The methane in natural gas burns completely in oxygen according to the reaction equation: CH4 +__O2 → __CO2 + __H2O Homework Equations a) Complete the reaction equation by filling in the missing coefficients for oxygen, carbon dioxide and water. b) How many kilograms...

Hydrogen and Oxygen "burn" Does anyone know the temperature at which this reaction becomes spontaneous? 2H2O--> 2H2 + O2 I can't find my book with thermodynamic data, but it should be cake for you guys. Thanks.

I was thinking about how you'd hybridize oxygen and nitrogen orbitals (should be pretty straightforward), but I was getting confused. It's clear to me for carbon binding to 3 atoms with a double bond on one (say C in benzene ring: electron from 2s gets promoted to 2p, then you have 3 sp2...

Say you built a magnetic array, and two long electrodes running perpendicular to the magnetic field, whose electric field is then perpendicular both the electrodes and the array. Most magnetoplasmadynamic thrusters (built as previously described) then send current at an enormous voltage through...

Could it be possible for a jovian planet to have an oxygen atmosphere breathable by humans? Let's say that the humans live in blimp-like stations, and the jovian planet is small like Neptune to reduce the high gravity.

1. Estimate the number of oxygen molecules in LTD under normal pressure and temperature. 2. I'm guessing you use PV=nRT to get the number of moles of gas in the room and work out the % of oxygen in the air, but I got a number which to me looks too small. 3. Volume of LTD is approx...

Hello, this is my first post, and I hope its in the correct forum! As the title says, I'm interested in the power needed to vaporise LOX(liquid oxygen). Specifically the physics involved for an old UK missile/rocket, called Blue Streak. Some info here for that rocket...

Homework Statement A welder using a tank of volume 8.00X10^-3 m^3 fills it with oxygen (with a molar mass of 32.0 g/mol) at a gauge pressure of 2.80×10^5 Pa and temperature of 39.0 Celsius. The tank has a small leak, and in time some of the oxygen leaks out. On a day when the temperature is...

Homework Statement The oxygen nucleus 16O has a radius of 2.91 fm. With what speed must a proton be fired toward an oxygen nucleus to have a turning point 1.11 fm from the surface? Homework Equations Kinetic energy = 1/2 mv^2 Potential energy = 1/4(pi)Enot * q/radius min The...

Homework Statement Calculate the density of Oxygen at STP using the ideal gas law Homework Equations PV=nRT The Attempt at a Solution n = (X grams Oxygen / 16g/mol Oxygen) I set V = to 1 m3 P = 1 atm R = 8.315 J/Mol K T = 273 K PV = nRT PV/RT = n 1/(8.315*273) = X grams...

I'm using the TURBOMOLE program to do some basic HF calculations. They all went fine except for the single oxygen atom. After doing an extended huckel theory guess to begin with, it recommended these occupations (d2h symmetry). That looks fine to me. The top two orbitals (4 and 5) are singly...

When water is boiled, and the dissolved oxygen that was in the water escapes, why does this raise the entropy of the system? The O2 gas has a higher entropy than the H20, so when it departs the liquid, shouldn't the entropy decrease as the gas is no longer present? Thanks.

The liquid oxygen is blue in color because of unpaired electron in it. (According to molecular orbital theory) In gaseous state also it has unpaired electron but it is colorless gas. Why? Why color appear due to presence of unpaired electron?

the composition of ozone is O3 and the oxygen O2 present in atmosphere.considering the masses of O3 and O2 , the O3 is more heavier than O2 then also ozone is situated above the oxygen (O2) present in atmosphere. why is it so? advanced thanks.

Under what conditions and how will negative oxygen ions react with hydrogen and hydrocarbons (such as methane or gasoline)?Does it require some catalyst or should be burned together? What is a way to harness spare electrons from oxygen when water is formed?

this is from Nick Lane's Oxygen book I didn't quite understand this paragraph regarding the sudden release of a large amount of oxygen from cyanobacteria following the ice ages i don't understand how it's better to bury it. surely reacting with organic matter would be better as it is...

So, my welding book has this big ole warning that says this: If oxygen under pressure comes into contact with oil or grease. A violent reaction will occur. When they say "comes into contact" does this mean the outside of the O2 cylinder or just the actual pressurized O2? Second, Why...

Hello, A friend of mine told me her dad used to work in the coal mines, like 800m under the ground, and he found that whenever he had to carry something heavy from inside to outside of the coal mine, he always noticed that carrying that same thing underground was easier than carrying it...

Does mixture of hydrogen and oxygen actually has to be ignited or the reaction occurs even without ignition when some critical H:O proportion is reached?

This is just a little question to satisfy my own curiosity, but can the Negative Ion of an Oxygen atom/molecule be used as an oxidizer? I would think not, because it wouldn't be able to accept another electron if it already has one. Am I right?

Homework Statement Enthalpies of Formation. burning methane in oxygen can produce three different carbon-containing products: soot (very fine particles of graphite), CO2 (g), and CO2 (g). A) Write three balanced equations for the reaction of methane gas with oxygen to produce these three...

Homework Statement Value of the Van der walls constant for the oxygen is 32 cubic centimeter. Find the diameter of the oxygen molecule? Homework Equations thermodynamics problem The Attempt at a Solution

Titan has rivers of liquid methane creeping in an atmosphere of mostly nitrogen. The lack of oxygen prevents the planet from being ridiculously unstable. Here’s my question -- If an asteroid rich in oxygen (or H2O) crashes into Titan, could the oxygen present in the projectile be enough to...

2C2H2 + 5O2 -> 4CO2 + 2H2O Oxidation: 2C2- -> 4C4+ + 12e- I am confused to where the reduction products are becuse the oxygens are part of the carbon dioxide and the water. Could somone please help me?

Instead of drag racers injecting nitrous oxide and extra fuel with it . Why don’t they just inject liquid oxygen with more fuel . for more power , Any input will be much appreciated.

Homework Statement The escape velocity of Mars is 5 x 10 ^3 m/s . If the temperature of Mars is 300K , determine whether or not oxygen can exist on the planet . (Molecular mass of oxygen is 32 g/mol) Homework Equations The Attempt at a Solution Using p=1/3 rho <c^2> p= 1/3...

I have read a little bit about some industries deaerating water used in boilers made of iron to prevent them from becoming damaged. I think this is because removing dissolved oxygen from the water lowers its redox potential. I think that this works because once the redox potential of the...

Various chemical formulae for the composition of superconductors quote the oxygen content, ie the number oxygen atoms present, as say Osub(10-delta). I would like to know the significance of delta.

Homework Statement For complete oxidation, 1mol of an organic compound requires 3mol of oxygen gas What could be the formula? a) CH3CHO b) CH3CH2OH c) CH3CH3 d) CH3CO2H Homework Equations The Attempt at a Solution What does it mean by complete oxidation? Is it combustion?

Say for instance you created an oxygen free oven, by flowing a gas other than oxygen through it and then heating up that gas. What would happen to things placed inside the oven? Objects won't be able to burn or oxidise because of the lack of oxygen, but what would happen to them? Will objects...

I have an under water application where I need the maximum amount of buoyancy with a limit to the volume i can use for a lifting device. My question is how much more Newtons would be exerted for helium instead of oxygen, or hydrogen instead of oxygen underwater? What is the percentage...

Earlier, I had posted that I thought that I had made liquid oxygen. People seemed skeptical that it would work, but I did an experiment to prove the concept. On a ring stand, I had some burning paper towel. I put some liquid nitrogen in a pie tin and allowed atmosphere to condense on the...

1. When liquid oxygen, being paramagnetic, is placed in a magnetic field it possesses magnetization in direct proportion to the field strength. 2. Does this mean that it emits a magnetic field and is itself a magnet while in this field 3. or is it just a part of the larger magnetic...

Went to visit a Jr. High today to make liquid nitrogen ice cream. One way is to drop the ice cream mix into the nitrogen. I think we actually made some liquid oxygen accidentally. After doing the dots, we strain the nitrogen through a sieve to catch the ice cream and store the excess in a...

As stated in the title. Is it possible? Say for example, if I have an Oxygen Atom. Is there anyway I can add in another proton to this Oxygen atom such that i can change it to some other element?

Hi all, if you have very pure oxygen (+99%) in your pipeline. HOW does the velocity of the oxygen causes fire in the pipeline? Thanks!