Air is a mixture of gases such as: Nitrogen,Oxygen,Carbon dioxide,Argon and many other gases . Air is a mixture is gases. Oxygen is a single gas made up of only oxygen molecules (O2]. Air has 78% nitrogen gas and 21% oxygen gas in it.
Basically when air fills our alveoli, by the process of diffusion, only oxygen in the air is taken into the blood stream while the other gases along with the waste CO2 is exhaled. So you do breathe in nitrogen, but it is exhaled as it is by the body.
Air and Oxygen are the same thing. Facts: Air and oxygen are two separate things. Air is a colorless, odorless, tasteless, gaseous mixture, mainly nitrogen (approximately 78 percent) and oxygen (approximately 21 percent) with lesser amounts of argon, carbon dioxide, hydrogen, neon, helium, and other gases.
The air we breathe is a mixture that contains primarily oxygen and nitrogen. The nitrogen generally makes up approximately 78% of the air, while oxygen makes up 21%. Other gases including carbon dioxide, hydrogen, helium, argon, and neon make up the remainder.
We breathe air that is 21 percent oxygen, and we require oxygen to live. So you might think that breathing 100 percent oxygen would be good for us -- but actually it can be harmful. So, the short answer is, pure oxygen is generally bad, and sometimes toxic. To understand why, you need to go into some detail …
First a nit-picking point - oxygen (O2) can be a solid, liquid, or gas depending on temperature and pressure. But I'd guess you probably already know that and are asking why oxygen is a gas at normal earth temperatures and pressures.
Oxygen is used by animals and plants in the respiration (breathing) process. Tanks of oxygen are used in medicine to treat people with breathing problems. They are also used as life support for astronauts and scuba divers. The majority of the oxygen used in industry is used in the manufacturing of steel.
By volume, dry air contains 78.09% nitrogen, 20.95% oxygen, 0.93% argon, 0.04% carbon dioxide, and small amounts of other gases. Air also contains a variable amount of water vapor, on average around 1% at sea level, and 0.4% over the entire atmosphere.
(We breathe because oxygen is needed to burn the fuel [sugars and fatty acids] in our cells to produce energy.) (Oxygen is brought into the lungs via breathing, where it is transported by red blood cells to the entire body to be used to produce energy.
The number eight also means that oxygen has eight protons in the nucleus. The number of protons and the number of electrons are always the same in an element that is neutral and has no charge. Therefore oxygen has 8 electrons. You will find that the atomic weight of oxygen is about 16.
If you mean the gas (O2), then you should say Oxygen gas, or diatomic Oxygen, or atmospheric Oxygen, i.e. a molecule made of two Oxygen atoms. It is not a compound because the molecule is made of only one elemen, Oxygen. It is thus not a mixture either. However it is usually part of a mixture, which is air.
A molecule is two or more atoms bonded together that may or may not be the same element. A compound is two or more different atoms that are bonded. Thus O2 is only a molecule because it is more that one atom and all atoms of the molecule are the same. "Oxygen gas" is not an element.
Medical oxygen is used to: restore tissue oxygen tension by improving oxygen availability in a wide range of conditions such as COPD, cyanosis, shock, severe hemorrhage, carbon monoxide poisoning, major trauma, cardiac/respiratory arrest. aid resuscitation.
Fractional distillation of liquid air. You need to be able to explain how nitrogen and oxygen are obtained from the air. You will recall that about 78% of the air is nitrogen and 21% is oxygen. These two gases can be separated by fractional distillation of liquid air.
Group 16: The Oxygen Family (The Chalcogens) The oxygen family, also called the chalcogens, consists of the elements found in Group 16 of the periodic table and is considered among the main group elements. It consists of the elements oxygen, sulfur, selenium, tellurium and polonium.
In nature, plants produce oxygen by using sunlight, carbon dioxide (another gas) and water. This process is called photosynthesis. Most of the oxygen in the air is produced by photosynthesis. Oxygen can also be produced by electrolysis.
Oxygen had been produced by several chemists prior to its discovery in 1774, but they failed to recognize it as a distinct element. Joseph Priestley and Carl Wilhelm Scheele both independently discovered oxygen, but Priestly is usually given credit for the discovery.
According to NASA, the gases in Earth's atmosphere include: Nitrogen — 78 percent. Oxygen — 21 percent. Argon — 0.93 percent.
|Classification:||Oxygen is a chalcogen and a nonmetal|
|Melting point:||-218.3 oC, 54.8 K|
The first two members of the family, oxygen and sulfur, are found in most ores. Oxygen is by far the most abundant element in the Earth's crust. Nearly half of all the atoms in the earth are oxygen atoms. Oxygen also makes up about one-fifth of the Earth's atmosphere.
Oxygen is the eighth element of the periodic table and can be found in the second row (period). Alone, oxygen is a colorless and odorless molecule that is a gas at room temperature. Oxygen molecules are not the only form of oxygen in the atmosphere; you will also find oxygen as ozone (O3) and carbon dioxide (CO2).