Oxygen Definition and 376 Threads

First off, I know nothing about physics so if this question seems bizarre, that's probably why! In theory, are there conditions that would permit electromagnetic energy to block or limit the passage of oxygen (normal, everyday oxygen levels)? Is electromagnetic energy denser than oxygen under...

is it possible to separate oxygen from air? in other words, getting pure oxygen from air

Homework Statement A mass of 0.736 kg of molecular oxygen is contained in a cylinder at a pressure of 1.0 × 105 Pa and a temperature of 1°C. What volume does the gas occupy? Homework Equations PV=nRT V=nRT/P The Attempt at a Solution n=(.736)(1000)/16 = 46 V =...

Can oxygen be removed from a liquid using argon gas?

This is not exactly physics, but I'm interested in a physicists opinion: Oxygen is considered a very active substance, very dangerous to many physiological processes of the cell. Even though or maybe as a result of this fact, we know that all life on Earth thrives on reach in oxygen...

how would the Earth be affected by global warming in terms of the sea level , global ocean circulation, and oxygen isotopes?

two questions, If one was to create some sort of suspended gravity embraced in a cylinder, and then send oxygen and small particles of mass through it would the oxygen travel through and the particles deflected? If not could one create a relative situation by using magnetic waves or gamma...

Does salinity decrease the dissolved oxygen concentration in a water sample? For example, if one has two water samples, a freshwater sample and a seawater sample, at the same temperature, will the seawater sample have a lower dissolved oxygen concentration? Thank you.

Homework Statement Lets say at room temp an atom of hydrogen moves at 3000 m/s. Let's say all things the same except you replace the hydrogen with oxygen. The oxygen is about 16 times the molar mass than hydrogen. Does this mean that the oxygen will travel at (1/16)*3000 m/s? The...

[SOLVED] conservation of energy Homework Statement From what height must an oxygen molecule fall in a vacuum so that its kinetic energy at the bottom equals the average energy of an oxygen molecule at 200 K? Homework Equations conservation of energy Eavg=3/2KbT Epot=mgh The...

[SOLVED] Converting Mol 1. A 20-cm-diameter cylinder that is 40 cm long contains 50 g of oxygen gas at 20 degrees celsius. How many moles of oxygen are in the cylinder? so 1 mol = 6.022*10^23 oxygen atomic mass=16g/mol 50g/16(g/mol) = 3.125 mol I don't know why it is wrong...

Hi everyone. I need help on this. I am trying out this problem and trying to see if I am doing this right, but I can't quite figure it out. The original question is: "A water sample , at 25 C, Eh= 0.2 and pH=5.40. Assuming this system is at equilibrium, calculate the amt. of dissolved oxygen in...

Currently 241 exoplanets. [URL="[PLAIN]http://en.wikipedia.org/wiki/Gliese_581_c"][http://en.wikipedia.org/wiki/Gliese_581_c/URL][/PLAIN] A few are terrestrial such as Gliese c, d at 5x and 8x Earth mass; sufficient mass to be geologically active, and hence a magnetosphere, diverting a stellar...

Denny Klein has (allegedly) discovered a way to turn H2O into HHO with very considerable energy output. I think this is a different process to the other 'salt water energy' thread so i'll start a new one here. It does look impressively powerful, in just three seconds he turns a large ball of...

http://news.yahoo.com/s/livescience/20071002/sc_livescience/hugestockpileofoxygenfounddeepinsideearth;_ylt=AlP5Y3bcO_CrB7jCXyUGvUkPLBIF A mineral that acts like a sponge beneath Earth's surface stores more oxygen than expected, keeping our planet from becoming dry and inhospitable like Mars...

Greetings. I have an inquisition as I enter the realm of the elemental. Exactly why does water consist of 2/3 hydrogen and 1/3 oxygen? What is a simplistic philosophical reasoning for this? I have recognized that it has nothing to do with the corrolation of atomic weight, or so as it...

This article; http://www.shns.com/shns/g_index2.cfm?action=detail&pk=SALTASFUEL-09-10-07 , from Scripps Howard talks about what appears to be a new method for seperating Water into Hydrogen and Oxygen by exposing it to an RF generator. From the Article: The article seems to make a big...

Can anyone tell me if it is right to say that maximum power of a hydrogen oxygen fuel cell varies directly (with constant efficiency) with gas flow rate at constant pressure at room temperature

Hi I would like to have the answers of a few basic questions. I would like to know that in a space shuttle, how is the oxygen level maintained? How does a space shuttle enter into the space? Does it just go staright from the Earth's atmosphere to the space or it has to follow a...

Hello everyone, I've been on Electrical Engineering for a little while but new to this aspect of science. I'm not sure of course but when sunlight travels through space, would it be the approximate temperature of its' surrounding area, pretty cool? And when it hits our oxygenated atmosphere...

Homework Statement I know with air bubbles in water that they will rise in water because they are lighter and less dense than water. But if you had let's say a tank of water suspended in the air and at the bottom of the tank there were small holes so small that air can go through the holes...

Homework Statement A syringe of volume 20 ml has just been used and now lies empty on the doctor's desk. The pressure in the office is 100,000 Pa. Assume that the air is an ideal gas consisting of nitrogen N2 (80%) and oxygen O2 (20%) molecules. k=1.38×10-23 J/K and the molar mass of oxygen is...

Homework Statement A standard cylinder of oxygen used in a hospital has gauge pressure = 2.0E3 psi (1.38E4 kPa) and volume = 16 L (0.016 m3) at T = 295 K. How long will the cylinder last if the flow rate, measured at atmospheric pressure, is constant at 1.8 L/min? Homework Equations...

Greetings, i am assigned to do a project which requires us to do experiment on ways to separate the rusted iron into 2 elements which are Iron and Oxygen. Anyone have any idea about that?:bugeye:

The best method of extracting energy out of hydrogen and oxygen Which method will deliver the best energy output? (1) Fuel cell (2) Burning the hydrogen and oxygen and make some steam and send it to a turbine (3) Internal combustion engine //piston like a car engine And which method...

questions to be answered 3.Explain how males and females differ in terms of: (a) Strength? (b) Oxygen transport (c) Body fat? 13. Pulse rate is a measure of aerobic fitness. Why? 15. Describe the effects and benefits of training? 16. Describe the advantages and disadvantages of training...

When hydroxide ion is added to Mn(II) in aqueous solution, an insoluble white precipitate of manganous hydroxide, Mn(OH)2, is formed. If there is oxygen present, this material reacts with it to form manganic hydroxide, Mn(OH)3 Part one was easy because it wasnt a redox it just needed to be...

Homework Statement Consider the reaction between Sulfiric acid and zinc: H2SO4 + Zn -> What would be the ionic equation for this reaction? Homework Equations The Attempt at a Solution In solution it would be H2+ + (SO4)2- + Zn -> Zn2+ + 2e- + (SO4)2- + H2+ -> Zn2+ + H2 (in...

I like the human example better than the general Wikipedia, so here goes the question: We all know water is polar yes? Meaning the Oxygen nucleus attracts the electrons more than the Hydrogen nuclei. So my question being, if you could in theory increase that attraction, make that...

Homework Statement Calculate the actual rate of oxygen consumption (ml/min/g @ STP) to one decimal place from the following information: Specific rate of oxygen consumption: 8.2 ml/min/g Temperature of room: 21 C Atmospheric Pressure of room: 76 mm of Hg a. 0.4 b. 0.6 c. 0.8...

I have a question regarding plasma .Suppose i heat a certain amount of dioxygen , O2 , which will first easely break into oxygen and after come to a point where at least 1 electrons gets free of the oxygen atom and hence the substence become plasma according to the definition. Now , if i keep...

I saw this in a locked topic: Who is right?

A hearty hello to all you admirable brainiacs. As this is my first post here it not coincidentally asks advice. I'm interested in creating a propulsion system fueled by hydrogen. I understand that hydrogen mixed with oxygen is explosive, but I need to calculate the exact amount of energy...

how to test the component inside oxygen absorber in food?? we guess that there may be iron(II) or iron(III) ion. we use reducing agent or oxidzing agent to test it ? however, if both of them exist in the oxygen absorber, how can we distinguish them?? :confused:

Of the following 6 metals (Ca, Mg, Zn, Fe, Sn, Cu), which should be the most reactive toward oxygen? I don't understand how you determine this...what should I be looking at and/or calculating?

Alright, this may seem a bit of a childish question, but for my sake I need it answered. So please stay with me. Alright, pretty much what this is all about is the effect that space exploration has on the Earth's air supply. We were all sitting around talking about the creation of a space...

Hi, I have a quick question. Ignoring quantum stuff, shouldn't I be able to predict the angle between the two hydrogens in a water molecule if I model the three atoms as point charges and assume that both hydrogens have a partial charge of +D and that the oxygen has a partial charge of -2D, and...

Have read that methanol reacts with B2O3 to produce Boron esters which volatilize during evaporation. Does this work? If so how?:!)

I would like to remove oxygen from boron powers by milling in milling the starting powders in an alcohol, specifically, methanol. I've been told B2O3 reacts with the methanol to produce boron esters which volatilise during evaporation of the milling solvent under a reduced pressure. Is this...

I understand that when the oxygen molecules are heated up in a pot of water, they will vibrate increasingly as they get hotter. I guess that's what those little bubbles are at the bottom of the pot. At some point, they will suddenly release. Is there a name for this threshold and a way to...

I am looking for an Oxygen absorbing material which will absorb Oxygen fairly quickly. Ideally, what I would like to do pass a stream of gas through a tube filled with this Oxygen absorber as well as a water absorbing material (possibly CaCl2) so as to remove as much Oxygen gas and water...

A standard cylinder of oxygen used in a hospital has the following characteristics at room temperature (295 K): gauge pressure = 13,800 kPa (2000 psi), volume = 16 L (0.016 m^3). How long will the cylinder last if the flow rate, measured at atmospheric pressure, is constant at 2.4 liters/min...

What colour is fire if your burning whatever in a room that is pure O2. rather then in normal air at a campfire which has a lot of other chemicals; like nitrogen. and does it follow that one experiment where say hydrogen burns as only 1 frequency of the spectrum

Question: Suppose that at most one O_2 can be bound to a heme group (see Problem 8), and that when \lambda(O_2) = 10^{-5} we have 90 percent of hemes occupied by O_2. Consider O_2 as having a spin of 1 and a magnetic moment of 1 \mu_B. How strong a magnetic field is needed to change the...

This is supposed to be an easy question, but I appear to be slightly lost. Can anyone give me a hint on what to do here? when waves of wavelength lamda are diffracted by a circular disc of diameter D the first minimum in the intensity of the scattered waves occurs at a scattering angle z...

Calculate the nuclear density of Oxygen element.As I know the molar mass number is 15.9994 and the density is mass/volume how can I get the volume inorder to calculate the density?

What is the easiest way you can tell or find out if oxygen is produced in a certain reaction? Or in other words, how can one prove that a certain reaction releases oxygen? The answer cannot deal with combustion. I searched on google, and couldn't quite get an answer. I thought about it for...

Ok, I know I have to use the ideal gas law, but am not exactly sure how to apply that to finding the density. PV=nRT (ideal gas law) 1atm (volume) = n(number of moles - can I just use 1 for ease?)(8.315 J(mol•K) (temperature) Not quite sure where to go from here, any help would be...

I am not sure if this question is even in the correct thread but please bear with me. I have a theory about the smell of sulphur following lightning strikes or extreme electrical activity in the atmosphere. (this has been quite well documted). Would it be possible for a very high voltage to...

A standard cylinder of oxygen used in a hospital has the following characteristics at room temperature (300 K): gauge pressure = 2500 kPa, volume = 10 liters. How long will the cylinder last if the flow rate, measured at atmospheric pressure, is constant at 2.4 liters/min? I'm lost on this...