Please explain ethene and the uses of it?
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Ethylene (or IUPAC name ethene) is the simplest alkene hydrocarbon, consisting of four hydrogen atoms and two carbon atoms connected by a double bond. Because it contains a double bond, ethylene is called an unsaturated hydrocarbon or an olefin.\n\nThe molecule cannot twist around the double bond at room temperature, and all six atoms lie in the same plane. The angle made by two carbon-hydrogen bonds in the molecule is 117°, very close to the 120° that would be predicted from ideal sp2 hybridization.
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Look at USES\n\nhttp://en.wikipedia.org/wiki/Sulfur_dioxide
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There are several uses for this.  Generally for chemistry students the effort teaches them how the measurements are made, good laboratory techniques, and hopefully, some insight into chemistry and the physical sciences.  It doesn't always work, but it makes a good experiment. \n\nFor those who are in the business of using various substances, it is very important to know what their physical properties are, and how they relate to the physical properties of other substances.  Your air conditioner was designed around those measurements, as was your car, paint, furnace, and just about everything that was manufactured around you.  \n\nWhile nature obviously doesn't carefully record properties in a lab book, they are important to how plants and animals work, how hard rocks are, how ice forms, etc.  Without understanding these properties, we can't understand nature or ourselves completely.
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If you remove a molecule of water (H2O) from C2H5OH (ethanol) you are going to end up with C2H4  (Ethene).
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Firstly find a picture of the structural formula of oestrogen (or see the link below).\nUsually this sort of model is made using balls of modelling clay for the atoms and cocktail sticks (toothpicks or similar) to represent the bonds.\nUse different colours for the different types of atom.\n\nNote - transporting it can be a nightmare so don't make too big! A shallow biscuit tin would be ideal.\nP.S. Note my UK spelling.
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This might help :)\nhttp://www.chemicalforums.com/index.php?board=8;action=display;threadid=3263
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It is more commonly referred to as Methyl Ethyl Ketone. or MEK.\nMEK is a very good solvent on its own. You may find it mixed with other solvents in Laquer thinner. Other similar solvents are benzene, xylene, toluene.\nUses for MEK: you may find it in these products\nAcid nonhousehold metal cleaners (liquid) \nAerosol paint concentrates \nArchitectural coatings \nAuto, other transportation, and machinery refinish paints incl primers \nAutomobile body polish and cleaners \nGeneral performance sealants (PVAC, butyl, vinyl, etc.) \nGravure inks \nGround/traffic marking coatings \nHousehold hard surface cleaners (aerosol) \nHousehold hard surface cleaners (liquid) \nHousehold tints and dyes \nIndustrial particleboard (furniture, fixtures, cabinets, etc.) \nInks, writing and stamp pad inks (excl drawing and printing inks) \nLaundry starch preparations \nLubricating oils \nMarkers, fine point and broad tipped \nMisc. use aromatics \nMiscellaneous agricultural/pesticidal products \nMiscellaneous paint-related products \nNail enamel and polish removers \nNonstructural caulking compounds and sealants \nOther art materials incl clay, water & tempera colors, finger paint, etc. \nOther automotive chemicals \nOther industrial chemical specialty products \nOther manicuring preparations \nOther miscellaneous allied paint products, including brush cleaners \nOther specialty cleaning and sanitation products \nPaint and varnish removers \nPaint thinners \nShoe polishes and cleaners \nSolvent thinned interior clear finishes \nSolvent thinned interior stains \nSolvent thinned interior undercoaters and primers \nSpecialty performance sealants \nSurfactants, finishing agents, and assistants \nSynthetic resin and rubber adhesives \nWaterproofing compounds \n\nIts kind of a nasty chemical as far as breathing it, but it is an excellent solvent
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??  how to use it.  how not to use it- as in warnings.  step by step directions (1,2,3...).  ingredients if applicable, a name for it,....
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Nobody answered your question.  =(  \nMost likely because of the minor spelling mistake.\n\nI'll assume that you are asking endergonic and exergonic rxn question.\n\nENDERGONIC means that energy is required to make the rxn occur.\nEXERGONIC means that energy is released as the rxn occurs.\n\nTherefore:\n\nSILVER TARNISHING IS AN EXERGONIC RXN:\nSilver tarnishing is a spontaneous process.  Ag + O2 ---> Ag2O.\nThis means that silver oxide (tarnished silver) is more stable or energetically favorable than its reactants.  Thus when something more stable is formed, Energy is Released.  \n\nPHOTOSYNTHESIS IS ENDERGONIC RXN: \nPhotosynthesis requires energy; and glucose- the product- has more energy than its reactants. In Biology, this process is called anabolic process because it builds big molecule, glucose, from small molecules, CO2 and H2O.
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The equation is correct, if I perceive it right. You have 3 ethoxy groups on the boron atom, which does correspond to that formula. It looks like what might happen if you reacted borane (BH3), possibly tethered in a THF complex, with ethanol (EtOH) to get the product and H2 gas, but a lot of heat too. Such a substituted Borane would be rather reactive, as a Lewis acid.\n\nB(OC2H5)3 + 6O2 ---> H3B03 + 6CO2 + 6H2\n\nis my best guess
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its a method of seperating individual molecules from a compound by placing samples on a special sheet coated with a material that will allow the molecules to seperate easily.  Then you put the place with samples in a developing chamber that will pull the molecules apart based on polarity.  That's not the best description in scientific terms, but that's pretty much how it works.  You just compare the distance each molecule traveled with the distance known molecules would travel in the same situation and it gives you a pretty good indicator as to what the unknown compound is composed of.
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http://www.chem1.com/acad/webtext/elchem/ec2.html#DESC\n\nhttp://www.chem1.com/acad/webtext/elchem/\n\nAnd many more by a google search
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i don't know exactly how the film is made. but the polythene is made up of monomers called ethene. Ethene is an alkene - notice the 'ene' on the end. Ethene has come from a process of 'cracking'. Before cracking, ethene was ethane - and guess what these are called- alkanes - notice the 'ane'. Alkanes make up crude oil, which we fractionally distill to get fuels such as petrol (for cars) and kerosine( aeroplane fuel)  \nAll these monomers (ethene) will join together to make a polymer - which in this case is polythene - in theory it should be called polyethene, not polythene. This process is called polymersiation. \n\nthis is it in basic form\n\ncrude oil ---> fractionally distilled (burn off fuels at certain temperatures) ----> get alkanes (which have a single carbon bond)-->process of cracking --> get an alkene (which have a double carbon bond - making it more reactive than an alkane) -->example - get ethene, which is a monomer ---> this monomer comes together with other monomers to make a polymer----> this process is polymerisation ----> the ethene monomers will come together to form polythene\n\nThere are other examples - such as the alkane - propane - notice 'ane' again. Once propane is cracked, it will form into an alkene called propene - notice 'ene' - the monomers are propene. So loads of propene monomers will come together (polymerisation) and form polyPROPene , not polyTHEne
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What Edward Acheson patented was the method of manufacturing silicon carbide (SiC), and not the material itself. He also discovered that by heating the silicon carbide even hotter he could make a pure form of graphite that could be used as a lubricant.  Carborundum is essential to the mass production of precision-ground machine parts that are interchangeable. Before the widespread availability of these types of compounds machinery parts had to be fitted for each specific machine, and parts could not be easily interchanged. \n\nIt is primarily used as a grinding compound or abrasive. Silicon carbide is used for bearings and parts in high-temperature aplications because it melts at over 2700 degrees C and has a hardness on the Moh's scale (of 10) of 9.25. It is valuable as a semiconductor in electronic applications because it has a high heat transmission rate and other useful electrical properties. \n\nIt is used to polish mirrors (used in astronomy), lenses, gemstone cutting, and high performance disc brakes such as those in some Porsche's. It can be used to filter diesel exhaust to remove small particles. It is also used as a gemstone substitute for diamonds, and actually has superior optical qualities to a diamond, having more fire and brightness. \n\nIt has been found as a natural mineral, but is rare. It is found both in kimberlite deposits where diamonds are found, and in meteorites. \n\nhttp://mineral.galleries.com/minerals/elements/moissani/moissani.htm
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I think you can find everythin u are lookin for and more on this site.. good luck!!!http://www.tannerm.com/electrochem.htm
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One of the breakdown products of petroleum is Ethylene--expressed as C2H4......Nearly all plastics have that as the base compound.  \nMany additives and catalyst are use to modify the structure of the long polymer chains to give it-- strength, corrosion resistance etc:, for specific uses\nJust one example: CPVC Water pipe has Polyvinyl Chloride+additional chlorination-- added in the process to allow the HOT water pipes in your home to not deteriate and not get brittle.  But in the chemisty process the clolrinenation is an added process thus making CPVC instead of just plain ole PVC which will not hold up under hot water usage.
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Some more linky's for you\n\nhttp://en.wikipedia.org/wiki/Mescaline\nhttp://www.erowid.org/chemicals/mescaline/mescaline.shtml