Coh3 chemical name
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Classified in Chemistry
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A mixture is a material system made up of two or more different substances which are mixed but not combined chemically.
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Temperature is the measurement of a substance's thermal energy.
A mercury thermometer consists of a bulb containing liquid mercury and a thin tube. The liquid expands due to thermal expansion and rises up the tube, allowing the temperature to be read on a calibrated scale.
A digital thermometer uses a microprocessor that measures the temperature and displays it on a liquid crystal display (LCD).
Common temperature scales include Celsius (ºC) and Kelvin (ºK).
Conduction is the transfer of heat energy primarily from solid to solid... Continue reading "Science Essentials: Temperature, Heat, Reactions, Environment" »
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An Arrhenius acid is a substance that dissociates in water to form hydrogen ions or protons. In other words, it increases the number of H+ ions in the water. In contrast, an Arrhenius base dissociates in water to form hydroxide ions, OH-.
A Bronsted-Lowry acid is a solution that donates protons and is known as a proton donor. The Bronsted-Lowry base, on the other hand, is a solution that accepts protons and is known as a proton acceptor. Going back to a Bronsted-Lowry acid, in general, it must contain a hydrogen ion that it can give up.
➢ Desalination: Process that removes sodium chloride and other minerals from salty water.
➢ Distillation: A separation process in which a liquid solution is heated, and the vapors are condensed and collected.
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Chemical reactions occur when bonds between atoms break and new bonds form, creating a new arrangement of atoms and at least one new substance. Observable changes, such as temperature fluctuations, color changes, gas formation, new solids, and odors, accompany these reactions.
Besides energy, mass is also conserved during chemical reactions. Lavoisier's experiment disproving the "phlogiston theory" led to the development of the "law of conservation of mass," which states that matter cannot be created or destroyed in a chemical reaction. Balanced chemical equations represent this law.
Energy is required to initiate reactions. Simply mixing chemicals... Continue reading "Understanding Chemical Reactions: From Atoms to Acid Rain" »
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Thompson was an historian with a Marxist background, whose interests of radical political works set him apart from other authors we studied. He, as Hoggart, followed culturalism, a perspective that stresses human agency, or the active production of culture, and not its passive consumption. His book The Making of the English Working Class embodies this term, since in it he traces the development of the English Working Class between the years 1780 and 1832, more or less the time encompassed by the Industrial Revolution. The book can be seen as a rescue operation of the members (especially radical ones) of the working class lost in the history lead by the deeds of monarchs, statesmen, military leaders and politicians. These other histories... Continue reading "The Making of the English Working Class: A Radical Perspective" »
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A series of organic compounds having similar structures and similar chemical properties in which the successive members differ in their molecular formula by -CH2 group.
The different members of the series are called homologous.
All the member of a homologous series can be described by a common general formula.
Example: All alkane can be described by the general formula CnH2n+2.
Each member of a homologous series differ from its higher and lower neighbouring members by a common difference of -CH2 group.
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When a neutral atom loses one or more electrons, the total number of electrons decreases while the number of protons in the nucleus remains the same. The result is that the atom becomes a cation—an ion with a net positive charge.
The opposite process can also occur. When a neutral atom gains one or more electrons, the number of electrons increases while the number of protons in the nucleus remains the same. The result is that the atom becomes an anion—an ion with a net negative charge.
H+ | H | H- | |
---|---|---|---|
Classification | cation | neutral atom | anion |
No. of protons | 1 | 1 | 1 |
No. of electrons | 0 | 1 | 2 |
Net charge | 1+ | 0 | 1− |
Most often, when we name monatomic anions, we add the suffix -ide to the end of the element's name.