Mustard Gas During World War I LOST was the original name for mustard gas‚ it was named after Lommel and Steinkopf. They were the first people who proposed this gas to the military to use as a weapon in 1916. Although mustard gas could possibly been developed as early as 1822 by a French chemist‚ Cesar-Mansuete Desperetez. Thirty-two years later Alfred Riche repeated this reaction of the sulfur dichloride and ethylene‚ but both Riche and Desperetez did not note any harsh properties. In 1860‚
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CONSERVATION OF NATURAL RESOURCES The term “resource” means anything that we use from our environment to achieve our objective. For example‚ we require bricks‚ cement‚ iron‚ wood etc. to construct a building. All these items are called the resources for construction of building. Are source can be defined as „any natural or artificial substance‚ energy or organism‚ which is used by human being for its welfare. These resources are of two types: 1.Natural resources 2.Artificial resources CONSERVATION
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FREE FALL AND CONSERVATION OF MECHANICAL ENERGY ABSTRACT Free fall is defined as the ideal falling motion of an object that is subject only to the earth’s gravitational field. To prove the law of conservation of energy‚ the free fall motion of an object can be represented through 3 different analyses; position of the object vs. time‚ velocity of the object vs. time‚ and acceleration of the object vs. time. It is observed in this ball toss experiment‚ at any point during the free fall period‚
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Conservation Paper: Tigers Facing Extinction (Name) April 7‚ 2013 Tigers Facing Extinction Introduction 3‚000 a year‚ 250 a month‚ 3-7 a day; the tiger population is facing extinction and we are the reason. If it weren ’t for us‚ the tigers would not go extinct much less be endangered. We don ’t eat tigers so why are they so endangered? Information "Of the eight original species of tigers‚ three have become extinct in the last 60 years‚ an average of one every 20
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WILDLIFE Wildlife means all the flora and fauna‚ which are not domesticated by humans. It includes animals‚ plants and microorganisms. The term wild life generally gives the impression of large and ferocious animals living in the jungle or waters such as lions and tigers‚ crocodiles and rhinoceros. Wild life refers to any living organism in its natural habitat. It includes all plants‚ animals and microorganisms other than animals domesticated and cultivated plants. The majestic lion‚ the grateful
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GAS LAWS Properties of Gases Gases expand into any available volume • gas molecules escape from open containers. Gases are completely miscible • once mixed they will not spontaneously separate. Gases are described in terms of T‚ P‚ V and n Volume‚ Amount and Temperature • A gas expands uniformly to fill the container in which it is placed – The volume of the container is the volume of the gas – Volume may be in liters‚ mL‚ or cm3 • The temperature of a gas must be indicated
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Gas Exchange To complete this worksheet‚ select: Module: Gas Exchange and pH Balance Activity: Animations Title: Gas Exchange Introduction 1. a. Describe the respiratory system role with oxygen and carbon dioxide. The respiratory system is responsible for the movement of gases involved in cellular metabolism. b. Why is oxygen needed? Oxygen is needed because it is used up during the aerobic breakdown of glucose. c. What generates CO2? Carbon dioxide arises from the aerobic
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Gas analysis techniques Terms for gas analysis techniques Concentration The term concentration describes the amount of a substance‚ expressed as mass‚ volume‚ or number of particles in a unit volume of a solid‚ liquid‚ or gaseous substance e.g. alcohol in beer or oxygen in air. Different units are in use to describe concentration in gases: Mass concentration Concentration expressed in terms of mass of substance per unit volume [g substance/m3 gas volume] ¢ Volume concentration Concentration
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Scientific laws explain observations and experiments that are verified and considered very high forms of scientific intelligence. The law of conservation of mass states that mass in an isolated system cannot be created or destroyed in an ordinary chemical reaction; rather conserved. In an easier explanation‚ everything you start with‚ you must end with. Although‚ the substance can look or be shaped differently from the original. Mass is a measure of the amount of matter an object contains. An example
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reaction conducted in this lab‚ including appropriate phase symbols. Mg(s) + 2HCl(aq) --> H2(g) + MgCl2(aq) 2. Determine the partial pressure of the hydrogen gas collected in the gas collection tube. The partial pressure of the hydrogen gas is 1.07 atm 3. Calculate the moles of hydrogen gas collected. pv=mrt ; n= .0013mol of hydrogen gas 4. If magnesium was the limiting reactant in this lab‚ calculate the theoretical yield of the gaseous product. Show all steps of your calculation. 0.03184 g
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