Experiment 9 Empirical Formula of Zinc Iodide Objectives Upon completion of this experiment‚ students should have learned: 1. The law of conservation of mass. 2. How to calculate an empirical formula. 3. The concept of limiting reagents. Introduction Synthesis and the determination of empirical formulas are two extremely important parts of chemistry. In this experiment‚ you will synthesize zinc iodide and determine its empirical formula. The molecular formula gives the actual
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AP Chemistry 12/13/11 Round-Trip Copper Reactions Lab The purpose of this lab was to evaluate our skills of decanting a supernatant liquid without losing the solid and successful completion of a series of reactions. This was done through five chemical reactions involving copper. In this lab‚ elemental copper was put through five different chemical reactions in order to convert it into different compounds. By the end of the fifth reaction‚ the copper was back to its elemental state. In the
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2.3 Magnesia-Doloma Refractories: The MgO-CaO system is remarkable for the high liquidus and solidus temperatures over the complete range 100% MgO- 100% CaO‚ as the eutectic for the CaO–MgO binary system occurs at 2370 ºC [3‚ 52]. MgO–CaO bricks are high-value refractories composed of lime (CaO) and periclase (MgO). MgO –CaO refractories has some advantageous and disadvantageous compared to MgO and CaO refractories (Table 1). Table 1 Typically‚ these refractories are composed by 50-80 wt. % of
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AIR POLLUTION Assalamualaikumwarahmatullahiwabarakatuh and a very good morning to my beloved teacher ‚Mr Norhisyam ‚and my fellow friend .Before I begin my speech let I introduce myself.Hello my name is Amirul Zharfan . I am from 102 class. My college number is CM131027‚ and my science teacher is Mr Norhisyam.Alright ‚ Today I would like to talk about air .Dear friends‚everyone know air is very important for us.As we know‚it is one
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BUILDING DEFECTS PART 1 • Identify common building defects • Identify the source • Provide pictures‚ diagrams and sketches • Suggest remedial action • Show details that would have avoided the defect PART 2 Generate a scheme for planned maintenance and provide a building checklist to ensure all necessary maintenance is carried out on a regular basis. INTRODUCTION In this project we will be looking at many different kinds of building defects that would be commonly seen in the construction
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What are the consequences of cutting down trees? There are many consequences for the environment of cutting down trees. Known as deforestation it has huge effects on the environment. It one very big effect is the loss of biodiversity which is a direct effect of cutting down trees. There are many reasons of which humans act out deforestation. For example is so that we can set up cattle farms. Also grow crops of which can then be sold to people. Another reason is for urbanisation and for the building
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reactions starting and finishing in elemental copper metal‚ and to practice quantitative laboratory techniques. Cu → Cu(NO3)2 → Cu(OH)2 → CuO → CuSO4 → Cu Cu(NO3)2 = copper nitrate Cu(OH)2 = copper hydroxide CuSO4 = copper sulfate CuO = copper oxide Experiment 1(a) Cu + 4HNO3 → Cu(NO3)2 + 2NO2↑ + 2H2O NO2 given off as a coloured gas* H(NO)3 Transfer contents to beaker containing 100 mL of water Cu 100mls H2O Wash conical flask with 10 mL of water *Carry out reaction in
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During the initiation and formation of the Grignard crushed magnesium was placed in a round bottomed flask with an iodine crystal with a bromobenzene solution with a stir bar. Once the stirring began‚ the solution turned brown and over time began to lighten up. The color change to brown indicated that the reaction began and this is why an iodine crystal was placed in the solution. The reaction started to boil due to its own reflux so heat didn’t need to be applied. Next the anhydrous ether solution
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acid rain Acid rain is rain or any other form of precipitation that is unusually acidic. It has harmful effects on plants‚ aquatic animals‚ and infrastructure. Acid rain is mostly caused by human emissions of sulfur and nitrogen compounds which react in the atmosphere to produce acids. In recent years‚ many governments have introduced laws to reduce these emissions. Emissions from volcanoes and those from biological processes that occur on the land‚ in wetlands‚ and in the oceans account for the
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basketball‚ golf‚ tennis‚ baseball‚ horseback riding‚ rappelling‚ aerobics‚ athletics‚ etc. Jogos e brincadeiras checkers‚ chess‚ bingo‚ poker‚ hide-and-seek‚ hopscotch‚ etc. Elementos químicos oxygen‚ uranium‚ carbon‚ hydrogen‚ nitrogen‚ magnesium‚ etc. Materiais cotton‚ jeans‚ silk‚ linen‚ rayon‚ terrycloth‚ wool‚ wood‚ plaster‚ gold‚ silver‚ platinum‚ brass‚ leather‚ glass‚ porcelain‚ steel‚ paper‚ etc. Ramos da ciência mathematics‚ acoustics‚ physics‚ aeronautics‚ mechanics‚ linguistics
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