CHEMISTRY PROJECT WORK SESSION -2013-2014 ROLL NO- CLASS-XII ‘A’ SUBMITTED BY SUBMITTED TO ROHIT LAKHERA Mrs. ANITA BISHT CERTIFICATE This is hereby to certify that‚ the original and genuine investigation work has been carried out to investigate about the subject matter and related data collection
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Gas Chromatography (GC) Definition: Gas chromatography is a physical method of separation in which the components to be separated are distributed between two phases‚ one being a stationary bed of large surface area‚ and the other a gas that percolates through the stationary bed. When the stationary phase is a solid‚ the separation process is more precisely called gas-solid chromatography. Introduction: Gas Chromatography is a technique widely used to separate complex mixtures of substances. Compounds
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In the 18th and 19th centuries scientists wrestled with identifying and describing the nature of the “stuff” that produced change. One concept that became popular for a while was that of “caloric” (what we now call heat). “Caloric was originally conceived of as a quantity that would flow from a hotter object to a cooler one that would warm up as a result. It answered the need for a way for the cause of warming to get from here to there. Not only did caloric serve as a cause for warming‚ it
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need of a project. 4.She’s got me doing butt clenches at my desk. 5. Lift up my hand and smack her with it. 6. For all I care‚ he can throw her through the damn thing. Only if you say his full name. It’s probably not as bad as it sounds but this friend of mine is‚ is getting a cat with his girlfriend. No dessert‚ just a check‚ please. You just can’t see it now because you haven’t had any closure. you’re bein’ a little weird about your phone. I am the energy train and you are on board.I’ve uh
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In the minds of many‚ this well-known tale of Honda’s entry into the U.S. motorcycle market illustrates intuition’s power in strategic decision making. Honda’s scouts saw a discouraging picture but felt they and their firm could be successful in spite of the odds. The discouraging analyses from government officials didn’t sway them from feeling they had the resolve and capabilities required to achieve competitive success. They felt that risking some of Honda’s precious resources to pursue
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Chemistry Review (mid-term) 1. Use the equation for atomic mass to answer the following questions. (http://johnheilchem10.escuelacampoalegre.wikispaces.net/file/view/average+atomic+mass+calculations+-+3.pdf) 1. Argon has three naturally occurring isotopes: argon-36‚ argon-38‚ and argon-40. Based on argon’sreported atomic mass‚ which isotope do you think is the most abundant in nature? Explain. 2. Copper is made of two isotopes. Copper-63 is 69.17% abundant and it has a mass of 62.9296 amu.
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A Friend in need is a friend indeed Who is a friend and what is that which is known as friendship? It is the connection that generally exists between two individuals who are not related to one another on account of any family ties. It is also possible that people who are close relations too can become friends. Here we are dealing with this kind of friends although there is another category of friends spread beyond national boundaries. This category is known as pen friends who begin their relationship
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"Friend" is an extremely strong word in today’s society. There are many aspects that create a friend and everybody may have a different perspective of what a friend truly is. They may define a friend as a person that’s always there for you and always has your back. Someone that they can sincerely depend on. A person who you know will be there until the very end. A friend is someone your NEVER embarrassed to be around‚ you accept them for who they are. There is always a mutual understanding between
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are in need or difficulty is a true friend. In our daily life we come across people who over a period of time become close to us. But we cannot be sure if they are true friends or just fair-weather friends. Many people develop contacts with influential people for their benefit. It will be a great mistake if one considers these apparently close people as friends. The test of true friendship is in time of difficulties.On the other hand‚ the fair-weather friends disappear in times of trails. They
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Chemistry Ozone Depletion Ozone depletion describes two distinct but related phenomena observed since the late 1970s: a steady decline of about 4% per decade in the total volume of ozone in Earth’s stratosphere (the ozone layer)‚ and a much larger springtime decrease in stratospheric ozone over Earth’s polar regions. The latter phenomenon is referred to as theozone hole. In addition to these well-known stratospheric phenomena‚ there are also springtime polartropospheric ozone depletion events. The
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