of the Experiment: The Empirical Formula of an Oxide Authors: Section Number: Chemistry Location and Date II. Abstract The aim in this lab was to determine the empirical formula of an oxide of magnesium through combustion in air. This was achieved by heating an established mass of magnesium in air inside of a crucible‚ ultimately attaining a compound that contained Mg and O. The major result of the experiment was the empirical formula of the oxide of magnesium. III. Introduction An empirical
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Si + 2H2O → SiO2 + 2H2 The oxidation process can be implemented through diffusion of either water or an oxygen species through the oxide already formed up which then reacts with the silicon at the Si-SiO2 interface. At high temperature‚ thermal energy makes oxygen molecule moving much faster‚ which can drive them to diffuse across an existing oxide layer and react with Si to form SiO2. As the oxidation continues‚ the interface moves into the silicon and a new‚ clean silicon surface is produced
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experiment. Keeping that in mind‚ I checked the information of each reactants and products on online resources. Not only did that help me realize the Aluminum was oxidized‚ it helped me understood that the product was the gray Copper (II) Oxide instead of the red Copper (I) Oxide. This was one of the problems that I was able to solve by careful observation and checking additional
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malachite and etc. According to the technical conditions of smelting‚ the copper ore can be divided into three classes based on the proportion of copper oxide and copper sulphide‚ that is‚ sulfide ore‚ which contains less than 10% copper oxide；oxidized ore‚ which contains more than 30% copper oxide; mixed ore‚ which contains 10%~30% copper oxide. Copper is one of earliest metals that be found and used by human beings‚ it is aubergine‚ with the specific gravity of 8.89‚ and melting point of 1083
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OUR OWN HIGH SCHOOL‚ Al WARQA’A‚ DUBAI SUMMATIVE EXAMINATION-2‚ MARCH -2014 Name: ______________________________________ Grade: VII Sec: ____ M Marks: 90 Time: 2 1/2 hours Subject: SCIENCE Date: 09/04/2014 General Instructions: 1. This question paper has 4 pages. 2. All questions are compulsory. 3. Question numbers 1 to 10 are questions of one mark each. 4. Questions 11 to 16 are very short answer questions of two marks each. 5. Question numbers 17 to 24 are short answer questions of 3 marks each
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information. The simplest compounds contain just two elements. Sodium chloride‚ NaCl‚ is an example of a binary compound. Several other examples are listed below. Potassium bromide KBr Calcium bromide CaBr2 Lithium fluoride LiF Lithium oxide Li2O When naming binary compounds follow these rules: 1. the element with the positive ionic charge is written first. 2. The second word is formed by changing the ending of the name of the element to “ide.” For example‚ bromine changes to bromide
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desirability and thus the value of a diamond used for jewelry. Sapphire - Sapphire (Greek: σάπφειρος; sappheiros‚ ’blue stone’‚ which probably referred instead at the time to lapis lazuli) is a gemstone variety of the mineral corundum‚ an aluminum oxide (α-Al2O3). Trace amounts of other elements such as iron‚ titanium‚ chromium‚ copper‚ or magnesium can give corundum blue‚ yellow‚ pink‚ purple‚ orange‚ or a greenish color. Chromium impurities in corundum yield a red tint‚ and the resultant gemstone
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required Selected material: Carbon fibre Introduction Advantages and disadvantages compared to other materials Sustainability issues Processing technique Selection 2: Baseball bat Brief description Properties required Selected material: Aluminium Introduction Advantages and disadvantages compared to other materials Sustainability issues Processing technique Sports and recreation equipment selection Selection 1: Bicycle frame Brief description Bicycle frame is the core part
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MARINE GROWTH PREVENTION SYSTEM AIM: To prevent fouling and growth of marine organisms in the pipe lines which are in contact with sea water. What is Marine Growth: Ships while sailing use seawater for several purposes. The seawater is used in the ship’s system and discharged after the use. However‚ seawater contains several marine organisms which enter the ship along with the seawater and deposit and flourish on the parts of the ship’s system. If preventive
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Strontium Manganese Oxide Introduction The ternary inter oxide SrMnO3 was first characterized by XRD by Negas and Roth []. This perovskite type inter oxide crystallizes in the hexagonal form with the space group P63/mmC(194). This inter oxide is of considerable interest to materials scientists owing to its ability to accommodate a high degree of anion vacancies‚ crystal structure and its high Neel Temperature (TN). It also exhibits polymorphism with two different cubic and hexagonal structures
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