Oxygen
Oxygen, symbol O, colorless, odorless, tasteless, slightly magnetic gaseous element. On earth, oxygen is more abundant than any other element.
Oxygen was discovered in 1774 by the British chemist Joseph Priestley and, independently, by the Swedish chemist Carl Wilhelm Scheele; it was shown to be an elemental gas by the French chemist Antoine Laurent Lavoisier in his classic experiments on combustion.
Large amounts of oxygen are used in high-temperature welding torches, in which a mixture of oxygen and another gas produces a flame of much higher temperature than is obtained by burning gases in air. Oxygen is administered to patients whose breathing is impaired and also to
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Gaseous oxygen can be condensed to a pale blue liquid that is strongly magnetic. Pale blue solid oxygen is produced by compressing the liquid. The atomic weight of oxygen is 15.9994.Oxygen composes 21 percent by volume or 23.15 percent by weight of the atmosphere; 85.8 percent by weight of the oceans and, as a constituent of most rocks and minerals,
46.7 percent by weight of the solid crust of the earth. Oxygen comprises 60 percent of the human body. It is a constituent of all living tissues; almost all plants and animals, including all humans, require oxygen, in the free or combined state, to maintain life.3
Three structural forms of oxygen are known: ordinary oxygen, containing two atoms per molecule, formula O2; ozone, containing three atoms per molecule, formula O3; and a pale blue, nonmagnetic form, O4, containing four atoms per molecule, which readily breaks down into ordinary oxygen. Three stable isotopes of oxygen are known; oxygen-16 (atomic mass 16) is the most abundant. It comprises 99.76 percent of ordinary oxygen and was used in determination of atomic weights until the 1960s.
Oxygen is prepared in the laboratory from salts such as potassium chlorate, barium peroxide, and sodium peroxide. The most important industrial methods for the preparation of oxygen are the electrolysis of water and the
The artistic director of the Bangarra Dance Theatre, Stephen Page noted of the spiritual aboriginal dance of ochres, the following, “As substance ochre has intrigued us. Its significance and the myriad of purposes, both spiritual and physical has been the driving force behind this collaboration. The portrayal of each colour is by no means a literal interpretation, but the awareness of its spiritual significance has challenged our contemporary expressions.” This quote tells us that the traditional use of ochre within aboriginal culture is important and significant and the portrayal of each colour within the dance is not a literal interpretation but rather the portrayal of each colour does not uphold exact meaning but shows us contemporary
The book I have chosen for this project is call Diary of an Oxygen Thief by Anonymous. This book is about him hurting girls, and him being hurt by girls (emotionally not physically). He also never says his name, so therefore him is who will be described as the main character. He tells about all the girls he has hurt, and the feeling of need to hurt him while he was drinking. After hurting all these women, and realizing that this also hurt him once they moved on he sobered up, and started getting big in the advistering business. He moves to the United States, for he was staying in London when he was hurting all these girls emotionally. He was living in Michigan, and was sent to New York for a work trip when he met Aisling, the girl he would
Also known as the oxygen family, chalcogens are sulfur (S), selenium (Se), tellurium(Te), and polonium (Po). Oxygen (O) is also in group 16, where chalcogens are located on the periodic table. While it is defined as a chalcogen, oxygen and oxides are often separated from chalcogens because its chemical behavior is much different than that of the other elements in the group. The other elements in the group show similar patterns in their electron configurations resulting in similar chemical behavior. The name chalcogen means "ore former," derived from the Greek words chalcos: ore and -gen: formation. An interesting fact is that oxygen is the most abundant element on Earth, second most in the Atmosphere, and third in the whole universe. It is
To tackle the housing affordability, first of all, it is crucial to lift the supply of housing as it will release the pressure on the housing price. Nevertheless, the supply of housing is inelastic as it requires an adequate fund, time, approval from the Government. Besides, the housing system is heavily dependent on the private sector. Thus, the Government should provide initiatives for housing providers to shift the supply of houses in the market. Australia would follow the policies from other countries to tackle the housing affordability. However, it has to fit in the Australian context. These policies might work well in other places but it does not mean that it will be applicable in Australia. The Singapore Government has a public
Helium (Greek helios,"sun"), symbol He, inert, colorless, odorless gas element. In group 18 of the periodic table, helium is one of the noble gases. The atomic number of helium is 2.
In 1929, tears swept the nation and gloom bestowed itself upon a once happy place. The Great Depression had started. People lost everything ,so many became migrant workers. Of Mice and Men, a classic novel written by John Steinbeck, emphasizes many sad themes, but gives us a good insight on what life was like in the 1940’s for many people. Although there are other themes, rootlessness, loneliness, and poverty are extremely prominent throughout the novel in many characters.
According to Egan’s, ventilation is the process of moving gas (usually air) in and out of the lungs Egan’s 225). If a patient lungs sounds are normal, the respiratory care practitioner is not concerned due to decrease in obstruction in the airway. Contrary, if the respiratory care practitioner listens to sounds like wheezes, stridor, rhonchi, rales, the practitioner is mostly concerned due to the fact that an increase in obstruction is either in the upper or lower airway. This increase obstruction could lead to decrease tissue oxygenation by causing tissue hypoxia, cyanosis, stagnant or a disease such as chronic bronchitis.
The alumni field is a made of artificial turf which can not support any vegetation.
Format your data into 6 'panels', that when printed on paper are exactly 9.5 cm square.
4. What was the pH level measured at Lake 3? Lake 3 is located within a wildlife preserve several miles downwind of Lake 1. When I got the sample and tested for the pH levels I felt it was closest to about 4 or 4.5.
Mitoxantrone dihydrochloride and sodium dodecyl sulfate (SDS) were analytical grade, purchased from Sigma Aldrich and used without further purification. Experiments were performed in 0.1 M phosphate buffer pH 7.4 and 0.1 M carbonate buffer pH 10. The deionized water (18.2 MΩcm, Mili-Q water purification system) was used for the preparation of solutions.
The great hero, who is brought low by his wife, Clytaemnestra, a good woman and an evil wife, also an ideal of a murderous wife.
Thanks for your informative essay. This is a summary of researched information to understand the hazards of oxygen therapy. “Oxygen is a necessity for nearly all of earth’s organisms” (Rahman et al, 2006). Caution should be taken with the delivery of oxygen, if not prescribed appropriately it causes cellular damage and death. (Amanda R Knight, Lauren E Fry, 2011).
the physical body and contains the human organs, body tissues and all anatomical parts. This is the
The paper presents a review, analysis and a study on hypoxia faced by pilots at higher altitudes. The problems faced by pilots of commercial flights and the ways and means of dealing with them with the use of technology used in military planes will be the point of discussion and focus. The usage of technology that minimize the conditions of hypoxia at higher altitudes and reduction of its