tuberculosis‚ diphtheria etc. The process of killing the harmful bacteria by some suitable treatment of water is called STERILIZATION of DISINFECTION OF WATER. The common sterilizer agents are chlorine‚ ozone‚ bleaching powder‚ potassium per magnate chloramines. Sterilization of water through bleaching powder gives chlorine and if it is in excess‚ it is harmful for health and causes diseases like chlorawis‚ unconsciousness etc. So here we determine the exact amount of bleaching powder used of required for
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packaging)‚ textiles and construction. Atomic structure and Properties Below is the chemical formula for PVC that consists of Carbon‚ Hydrogen and Chloride. PVC is a thermoplastic polymer meaning that is recyclable‚ the addition of the chlorine atom allow for easier identification during automated sorting systems and with today’s society being environmentally concise these become important properties. Other important properties of PVC that make it a desirable polymer are its resistance
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EN 102 April 7‚ 2013 WWI Paper: Draft One In the poem “Dulce et Decorum Est” written by Wilfred Owen‚ the audience is introduced to the horrifying experience of a gas attack in World War I. Owen goes into excruciating detail on every effect of the gas‚ and describes almost everything about the physical state of the infected‚ dying man. Thousands of soldiers were exposed to gas in the war‚ and unfortunately‚ many of them died from the effects. The first attack that the Germans unleashed on the
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PurposeIn this experiment‚ sodium hypochlorite (NaOCl) in acetic acid mixture was used to oxidize emdo-borneol (an alcohol) to camphor (a ketone). The product would then be purified by sublimation and then be analyzed by Infrared spectroscopy and melting point test. Procedure and ObservationsPlease refer to the lab manual and the carbon copy attached. Data and CalculationsWeight of endo-borneol = 0.2013gNo of moles of endo-borneol = 0.2013g/154.25g mol-1 = 1. 305mmolSince one mole of endo-borneol
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Harmful Chemicals in our Environment Over the past century humans have introduced a large number of chemical substances into the environment. Some are the waste from industrial and agricultural processes. Some have been designed as structural materials and others have been designed to perform various functions such as healing the sick or killing pests and weeds. Obviously some chemicals are useful but many are toxic and their harm to the environment and our health far outweighs their benefit to
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In World War One‚ chemical weapons became popular. Poison gas‚ such as mustard and chlorine became the number one thing to use. Gas was invented to cause fear to the soldiers the army was fighting. The gas could cause death quickly over a few days which was why poison gas was the most feared of all the soldiers. Poison gas could be used when the soldiers wanted to knock out a large amount of people without having to do much. Gun shots from a machine gun were more common but using the gas put
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Survey of the Sciences Unit 4: The Science of Fireworks 7-7-14/7-14-14 What is a firework? An explosive or combustible used for display. In the 19th century the introduction of new ingredients such as magnesium and aluminum greatly heightened the brilliance of such displays. There are two main classes of fireworks‚ force-and-spark and flame. In force and spark compositions‚ potassium nitrate‚ sulfur‚ and finely ground charcoal are used‚ with additional ingredients that produce various types
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Environ. Sci. Technol. 2010‚ 44‚ 7184–7192 Concentration‚ Chlorination‚ and Chemical Analysis of Drinking Water for Disinfection Byproduct Mixtures Health Effects Research: U.S. EPA’s Four Lab Study JONATHAN G. PRESSMAN‚† S U S A N D . R I C H A R D S O N ‚ * ‚‡ THOMAS F. SPETH‚† RICHARD J. MILTNER‚† MICHAEL G. NAROTSKY‚§ E. SIDNEY HUNTER‚ III‚§ GLENN E. RICE‚| LINDA K. TEUSCHLER‚| ANTHONY MCDONALD‚§ SHAHID PARVEZ‚| STUART W. KRASNER‚⊥ HOWARD S. WEINBERG‚# A. BRUCE MCKAGUE‚∇ CHRISTOPHER
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Technologies of World War I Roland Brown HIST102 Dr. Kahan September 21‚ 2014 There have been several technological improvements on the battlefield since the start of the first Great War. Armies set foot in combat zones anticipating offensive victories with the use of their numbers alone. Trench warfare proved these old tactics to be erroneous and obsolete. Complimenting these new approaches to warfare were also new weapons. The development of the machine gun‚ artillery‚ tanks
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Metals and Halogens reactions Elements such as fluorine‚ chlorine‚ bromine‚ iodine‚ and astatine belong to Group 7‚ Halogens. At room temperature‚ fluorine is a yellow gas‚ chlorine is a pale green gas‚ bromine is a red liquid‚ and iodine is a purple solid. Astatine is a radioactive element‚ therefore it exists only in small amounts. All the halogens exist in diatomic molecules. They have high ionization energies and are the most electronegative elements. Their electron configuration ns2 np5 make
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