Platonic Solids Essay I think that there are exactly five regular polyhedra‚ and I intend to prove why there are exactly five polyhedra. Ok‚ firstly‚ we need to identify what the five polyhedra are. They are the tetrahedron‚ the cube‚ the octahedron‚ the icosahedron‚ and the dodecahedron. All of these are regular polyhedra have something in common. For each shape‚ each of its faces are the same regular polygon‚ and the same number of faces meet at a vertex. This is the rule for forming regular polyhedra
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EXPERIMENT II: SEPERATION OF A MIXTURE OF SOLIDS PURPOSE: The purpose of this experiment was for me to become familiar with the separation of mixtures and solids and to learn separation techniques based on the chemical properties of a substance. PROCEDURE: Before beginning‚ I set up a data table to record data from the experiment. 1. Separating out the Iron a) I used my digital scale to determine the mass of my weighing dish. b) I emptied the entire mixture of solids from the plastic bag into
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How the accident can affect environm Solid Waste Management Program in India Photo 3 WBI has been working in the urban capacity building sphere in India with a network of partners over the last three years. One of the components of the program has been support to the Solid Waste Management (SWM) agenda. The key areas of WBI support to the SWM program have been to: v build core content for the capacity building of the Urban Local bodies (ULBs) based also on best practices from across
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General College Chemistry LabPaq / Published by: Hands-On Labs‚ Inc. sales@HOLscience.com / www.HOLscience.com / Toll Free 866.206.0773 A Laboratory Manual of Small-Scale Experiments for the Independent Study of General College Chemistry 50-0123-CK-02 LabPaq® is a registered trademark of Hands-On Labs‚ Inc. (HOL). The LabPaq referenced in this manual is produced by Hands-On Labs‚ Inc. which holds and reserves all copyrights on the intellectual properties associated with the LabPaq’s
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in Pipet 1 Thymol Blue Indicator‚ 0.04% - 0.5 mL in Pipet Experiment procedure: Part I: 1. Prepare an ice water bath by partially filling one of the 50-mL beakers from your LabPaq with tap water and crushed ice. Set aside. 2. Prepare a hot water bath by partially filling the second 50-mL beakers from your LabPaq with very hot tap water. Set aside. 3. Using a 24-well plate add 5 drops of 2.0 M MgCl2‚ magnesium chloride solution to wells C1 and C2. Add 10 drops to wells C3 and C4. 4. Add
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extracted three times using 20 ml of dichloromethane. Theresidue was collected by decanting the mixture of organic extract and anhydrous sodiumsulfate and evaporating it to dryness. The percentage yield was computed by getting theratio of the weight of the crude caffeine (residue) and weight of the tea leaves used. Thepercentage yield was 0.92. INTRODUCTION Extraction is a method of seperation in which a solid or solution is contacted with a liquid solvent (the two being mutually insoluble) to transfer
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ColleGe Chemistry LabPaq / Published by: Hands-On Labs‚ Inc. sales@HOLscience.com / www.HOLscience.com / Toll Free 866.206.0773 a laboratory manual of small-scale experiments for the independent study of General College Chemistry 50-0125-CK-01 LabPaq® is a registered trademark of Hands-On Labs‚ Inc. (HOL). The LabPaq referenced in this manual is produced by Hands-On Labs‚ Inc. which holds and reserves all copyrights on experiences. The laboratory manual included with a LabPaq is intended for
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Manual Physics I LabPaq: PK-1 A Lab Manual of 13 Experiments for Independent Study Published by Hands-On Labs‚ Inc. Physics 1: Lab Manual of Experiments for the Independent Study of Physics Designed to accompany Physics LabPaq PK-1 081611 LabPaq® is a registered trademark of Hands-On Labs‚ Inc. (HOL). The LabPaq referenced in this manual is produced by Hands-On Labs‚ Inc. which holds and reserves all copyrights on the intellectual properties associated with the LabPaq’s unique design
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Laboratory Techniques and Measurements (adapted from Labpaq Version 09.1.06 by Peter Jeschofnig‚ Ph.D.) Experiment Summary You will have the opportunity to learn how to conduct measurements in mass‚ volume‚ and density using scales and common laboratory equipment. Review the safety materials and wear goggles when working with chemicals. Read the entire exercise before you begin. Take time to organize the materials you will need and set aside a safe workspace in which to complete the exercise
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during the procedure. It was possible to distinguish between physical and chemical changes using scientific observations. Experiment and Observation Please note that this procedure was adapted from the “Observation of Chemical and Physical Changes” LabPaq Lab manual (Hands-On Labs Version 42-01-82-00-03‚ 2015) Table 1 Well Chemical #1 (4 drops) Chemical #2 (4 drops) Observations: Chemical Change (Y/N) A1 NaHCO3 (Sodium Bicarbonate) HCl (Hydrochloric Acid) Bubbles‚ no change in color‚ clear‚ Y A2 NaOCl
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