Mass Purpose Determine the mass of several samples of chemical elements and compounds and use the data to count atoms. Procedure Start Virtual ChemLab and select Counting by Measuring Mass from the list of assignments. The lab will open in the Calorimetry laboratory. Part 1‚ Measuring Metal 1. Click on the Stockroom. Click on the Metals sample cabinet. Open the top drawer by clicking on it. When you open the drawer‚ a petri dish will show up on the counter. Place the sample of gold (Au) in the
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DELHI TECHNOLOGICAL UNIVERSITY SCHEME OF EXAMINATION AND COURSE CURRICULUM B.Tech (MATHEMATICS AND COMPUTING) CONTENT Scheme of Examination.................................................................................. 2-6 Course Curriculum First Year........................................................................................................ 7-13 Second Year................................................................................................... 13-19 Third
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How do sharks reduce drag? And what are the engineering applications? There are three types of drag present on the shark during locomotion. The first type of drag is known as frictional drag‚ which is the greatest element of drags in the shark. This is arises due to the friction created between the skin and the boundary layer and can be reduced with a condition that the boundary layer maintains a turbulent flow. The second type of drag is pressure drag‚ which causes by water deflecting off the moving
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The cell theory‚ or cell doctrine‚ states that all organisms are composed of similar units of organization‚ called cells. The concept was formally articulated in 1839 by Schleiden & Schwann and has remained as the foundation of modern biology. The idea predates other great paradigms of biology including Darwin’s theory of evolution (1859)‚ Mendel’s laws of inheritance (1865)‚ and the establishment of comparative biochemistry (1940). First Cells Seen in Cork While the invention of the
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with Sneddon J‚ Bezur L‚ Michel RG‚ Ottaway JM (1982) Square-wave wavelength modulation system for use in atomicspectrometry Snellman W (1968) An a scanning method with increases sensitivity in atomic absorption analysis using a continuum primary source Snellman W‚ Pains TC‚ Yee KW et al (1970) Flame emission spectrometry with repetitive optical scanning in the derivative mode Spitsyn PK‚ Korepanov VE (1980) Modernization of registrating spectrophotometer SP-8. (in Russian). Zhurn Analit Khim 35:2441–2444
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transferred from one object to another in predictable ways. For example‚ if you leave a piece of hot metal in a room‚ the metal and the room will reach an equilibrium somewhere in between the two initial temperatures. The measure of the heat transfer is calorimetry‚ which is what we used in this lab. Lastly‚ Hess’s Law is used in this lab to take the ΔHrxn of two reactions to form the ΔHrxn of the desired
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Part I: Insert a complete data table‚ including appropriate significant figures and units‚ in the space below. Also include any observations you made over the course of Part I. Part II: Insert a complete data table‚ including appropriate significant figures and units‚ in the space below. Also include any observations you made over the course of Part II. Calculations: Show your work and write a short explanation with each calculation. Part I: Calculate the energy change (q) of the surroundings
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Calorimetry 1. How many calories would it take to raise the temperature of 200 g of water 100oC? 2. It takes 23.5 J to raise the temperature of 10.0 g of silver by 10oC. What is the specific heat of silver? 3. A 255 g quantity of gold is heated from 28oC to 100oC. How many joules of energy were used? (specific heat of gold = 0.13 J/goC) 4. What will be the final temperature of 5.00 g of silver at 37oC if it gives off 25.0 J of heat to the surroundings
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Journal of Bangladesh Academy of Sciences‚ Vol. 35‚ No. 2‚ 203-210‚ 2011 CRYSTALLIZATION OF ZINC SULPHATE SINGLE CRYSTALS AND ITS STRUCTURAL‚ THERMAL AND OPTICAL CHARACTERIZATION J.K. SAHA AND J. PODDER* Department of Physics‚ Bangladesh University of Engineering and Technology‚ Dhaka-1000‚ Bangladesh ABSTRACT Zinc sulphate (ZnSO4.7H 2O)‚ an inorganic material has been crystallized by an isothermal evaporation method. ZnSO 4.7H2O is highly soluble in water and the solubility is found to be increased
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Introduction CL-20 is a energetic compound with high density‚ good oxygen balance (-11%) and high explosive power. However‚ CL-20 has failed to see widespread implementation due to high mechanical sensitivity‚ it is relatively easily detonated by physical forces in comparison to other secondary explosives. While cocrystal CL-20/TNT exhibited a mechanical impact sensitivity greatly reduced relative to that of pure CL-20‚ it was also expected to feature reduced explosive power due to the
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