the solvent was evaporated‚ leaving greenish-white crystalline caffeine residue weighing about .25 mg. In order to recrystallize the caffeine‚ we used a mixed-solvent method‚ consisting of hot acetone and hexanes. The solution was cooled and a vacuum filtration was done to remove the caffeine crystals. The final product weighed about 3 mg. Introduction Caffeine is an organic compound that is found in tea leaves and coffee beans. It is a basic substance (due to the nitrogen atoms in its structure)
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have one feature that they are INNOVATIVE‚ this means that they are constantly making new product with new technology and ideas. They also fulfil their customers need Examples of Dyson product are Hand Dryer Bladeless Fan Vacuum Cleaners Features identified in organisation 2: Apple is also the INNOVATIVE‚ because they always improve their products and release new models. Apple meet their customer needs this means that Apple are making something new for their customer‚ because
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ether‚ or a liquid polar solvent‚ such as acetic acid‚ to dissolve solutes of the solid mixture. Because “like dissolves in like‚” the desired solute is dissolved into the solvent and the undesired solute is left in the solid phase. Through use of vacuum filtration‚ the solid and liquid can be separated‚ leaving the solid on the filter paper and the liquid in the container below. Liquid-liquid extraction is a method based on the varying
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them. Our tasks will include picking up and sorting clothes‚ cleaning off the dresser tops‚ make the bed‚ organize the fridge‚ sweep the floor‚ vacuum the rug‚ and plug in an air freshener. After evaluating what is needed to complete those jobs‚ I believe that you would need to collect a hamper‚ multi-purpose cleaner (pledge)‚ paper towel‚ a broom‚ a vacuum‚ and an air freshener. Now that the preparation is done you should move into the first step of the cleaning process‚ gathering and sorting dirty
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solar system‚ we were left to wonder‚ are there other planetary systems out there‚ and did they form like ours? This project leads you to find out how mighty planets are formed from cosmic dust. The red beans (dependent variable) were tested in the vacuum chamber with Earth’s gravitation pull and without the gravitation pull (independent variable) by pouring water into the chamber (buoyancy counteracts gravity). My hypothesis was that without the Earth’s gravitation pull‚ the particles would clump
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trimester of your pregnancy (1-12 weeks). One method includes ‘Vacuum Aspiration’ which include two methods. One is Manual vacuum. This procedure can be used around 5 to 12 weeks after the last menstrual period (early first trimester). It involves the use of a specially designed syringe to apply suction. This method is not available everywhere‚ but it may be more available than machine aspiration in some geographic areas. Second is Machine vacuum. This procedure is a common method used in the first 5 to
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Physical Chemistry CHM2330 Experiment F- Raoult ’s Law Experiment By: Sanah Assaad Student Number: 5267864 Partner: Jihad Arafa T.A: Didier University of Ottawa March 25‚ 2010 Objective: The purpose of this experiment is to study the total vapour pressure of ideal or non-ideal mixtures of two volatile liquids as a function of chemical composition. Introduction: For ideal mixtures of volatile liquids the vapour pressure of any given mixture may be obtained by applying Raoult
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Opposing to the special that we just aired‚ "What Happened on the Moon-- Hoax‚ Lies‚ and Videotape‚" America did land men on the moon. Many people are saying that it was staged; they are saying that the shadows are not correct. Here’s where they’re wrong: there are two light sources on the moon‚ the Sun and the Earth. On the moon‚ the Earth would appear as almost "full" and would reflect more light onto the moon than a full moon would onto Earth.
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Atmospheric pressure is absolute pressure or about 14.7 Measurement PSIA. 0 PSIA would be a perfect vacuum. ACTUAL PRESSURE - The pressure measured by a gauge or generated by a tester. BACKGROUND‚ LINE‚ OR STATIC PRESSURE - The magnitude or pressure in a differential pressure gauge‚ or transmitter PSIG‚ but the differential pressure may only be 1 PSID
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Service Training Self-Study Program 824803 The Volkswagen 2.0 Liter Chain-Driven TSI Engine Volkswagen Group of America‚ Inc. Volkswagen Academy Printed in U.S.A. Printed 5/2008 Course Number 824803 ©2008 Volkswagen Group of America‚ Inc. All rights reserved. All information contained in t his manual is based on the latest information available at the time of printing and is subject to the copyright and other intellectual property rights of Volkswagen Group of America‚ Inc.‚
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