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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Chemical agents have been around for many decades and have helped in the winning of wars but have also introduce a way to killing people that almost anyone can come up with and this has allowed terrorist organizations to have more ways to terrorize people throughout the world. Chemical warfare is really where it all began in World War One from the French. Normally we hear that the Germans started this but in fact the French did and the Germans were the first to study it with great detail and use
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Hairspray is a solution of long‚ chainlike molecules (called polymers) in a very volatile solvent. Spraying deposits a stiff layer of the polymer on your hair after the solvent evaporates. The solvent used was once a compound of carbon‚ fluorine‚ and chlorine (a chlorofluorocarbon‚ or CFC). CFCs are nontoxic‚ nonflammable‚ and make almost ideal aerosol propellants. But when it was learned that they causedestruction of stratospheric ozone‚ they were replaced with other solvents‚ like alcohols and hydrocarbons
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The Preston plant of Rendall Graphics was located in Preston‚ Vancouver. The plant produced Precision coated papers for ink-jet printers which accounted for the majority of the plant’s output. It started to experience problems in the quality of their output of the ink-jet paper and had received feedback in late 1998 from Hewlett-Packard (HP) about the problem. The team at Preston worked to resolve the problem and in October of 1999 made recommendations for a revised and improved coating formulation
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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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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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COMPARE AND CONTRAST THE SOLDIER AND DULCE ET DECORUM EST LEARN OPENING PARAGRAPH Poems regarding the subject of war usually fall into one of two categories. For example ones like The Soldier by Robert Brook actually praise and glorify war‚ but in comparison‚ poems like Dulce Et Decorum Est¨ by Wilfred Owen‚ highlight the horror and cruelty of war. Even though two poems talk about the same subject - war‚ the writers have very different ideas‚ views and opinions. Whether or not it is right
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Section A (Answer ALL questions in this Section.) 1. Rubidium (Rb) and potassium belong to the same group in the Periodic Table. The relative atomic mass of rubidium is larger than that of potassium. (a) Explain whether rubidium is more reactive than potassium. (b) Write a chemical equation for the reaction between rubidium and water. (State symbols should be given.) (c) Suggest how rubidium can be stored safely in the laboratory. (d) Suggest ONE safety precaution for handling
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OCR B (Salters) AS level Chemistry UNIT 2 – F332 Elements from the sea Halogens and Halides (group 7 chemistry) * Halogen is the elemental molecule‚ eg/ Cl₂‚ Br₂ * Halide is in a compound‚ eg/ KBr‚ KCl | Fluorine | Chlorine | Bromine | Iodine | Appearance at room temp | Pale yellow gas | Green gas | Dark red volatile liquid | Shiny black solid – sublimes to purple gas | Halide | Colour precipitate with silver nitrate | KCl | White | KBr | Cream | KI | Pale Yellow |
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9.5 – Industrial Chemistry (Option): Δ. Construct word and balanced formulae equations of all chemical reactions as they are encountered in this module: The EQUILIBRIUM Constant: For the basic reversible reaction‚ depicted as: aA + bB cC + dD; Uses of SULFURIC ACID: Fertiliser Production: Creating ammonium sulfate: sulfuric acid + ammonia ammonium sulfate H2SO4 (aq) + 2NH3 (aq) (NH4)2SO4 (aq) Dehydrating Agent: Dehydration of ethanol: ethanol ethylene + water C2H5OH (l) C2H4 (g) + H2O (l) Dehydration
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