Application of Statistical Concepts in the Determination of Weight Variation in Samples Galingana‚ Cara Lois T. Department of Food Science and Nutrition‚ College of Home Economics University of the Philippines‚ Diliman‚ Quezon City Date Due: December 7‚ 2012 Date Submitted: December 7‚ 2012 ------------------------------------------------- Keywords: Sampling‚ Central Tendency‚ Accuracy‚ Precision‚ Quantity‚ Statistical Tests RESULTS AND DISCUSSION In the experiment‚ the class was
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A. WORK-OUT PROBLEMS: Write formulas for the following: calcium nitrate phosphorous pentafluoride aluminum carbonate strontium hydroxide methane potassium oxide lithium chloride barium sulfate phosphate ion dinitrogen tetroxide Give the complete electron configurations of: S‚ O2-‚ and Mn. For the following molecules/ions‚ give the Lewis structure‚ molecular geometry‚ and electron pair geometry: NO2- SF4 Write Lewis structures to represent all resonance forms of CO32-
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Investigating in the effect of ion concentration in electrolytes on the potential difference in a voltaic cell Introduction When two electrodes made of different metals are connected together in a voltaic cell‚ the chemical energy present is converted into electrical energy and an electromotive force is generated. This force‚ called the electrode potential‚ is normally measured under standard conditions‚ which is 298K‚ 1 mol dm-3 solution for the electrolyte. However when one measures the electrode
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The Effect of Yeast on Different Fruit Juices | Researched by Kristyn S. 2001-02 | * PURPOSE * HYPOTHESIS * EXPERIMENT DESIGN * MATERIALS * PROCEDURES * RESULTS * CONCLUSION * RESEARCH REPORT * BIBLIOGRAPHY * ACKNOWLEDGEMENTS * ABOUT THE AUTHOR | PURPOSEThe purpose of this experiment was to determine the amount of fermentation of four different fruit juices after adding yeast. I became interested in this idea when I saw the fruit in my family’s refrigerator
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Intermolecular forces – design lab Research question: To calculate the solubility of equal masses nitrates of four di-positive ions (Lead Nitrate‚ Barium Nitrate‚ Copper Nitrate & Ferrous Nitrate of 0.5 M concentration) in an equal volume of water and relate this to the ionic radius of the element and the molar mass of the nitrate chosen and hence comment on the intermolecular forces in each of these nitrates. + write mass Justification of the research question: I was particularly interested
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Chp. 15 Chemical equilibrium: Occurs when a reaction and its reverse reaction (opposing reactions) proceed at the same rate At equilibrium the rate at which products are produced from reactants equals the rate at which reactants are produced from products At equilibrium a particular ratio of concentration terms equals a constant The composition of an equilibrium mixture does not change with time Kc: equilibrium constant 15.2 Law of mass action: expresses the relationship between
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Lab experiment 12 Percent of water in a hydrate The goal of Experiment 12 was to learn how to calculate the percent of water (by mass) in barium chloride and an unknown hydrate salt‚ as well as properly calculating the water of crystallization for the unknown hydrate salt. A hydrate salt is composed of anions (-) and cations (+) surrounded by a fixed number of water molecules‚ called water of crystallization. The hydrate decomposes upon heating and
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1 PRACTICE EXAM (not all questions pertain to a specific mid-term). This is taken from an earlier final exam. 1. (4 pts) Permanganate ion oxidizes sulfide ion to elemental sulfur (which you should represent as a single S atom) and is reduced to MnO2 in basic solution. In the balanced equation for this reaction‚ which you should determine in the work area‚ how many water molecules and hydroxide ions are needed in the final balanced equation? Work area: # of H2O ____4______ # of OH-
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Name: ______________________________________________ CHEM 102 – SPRING 2014 Study Guide: Exam 1 The following questions should assist you in your preparation for Exam 1‚ but does not include everything that you are responsible for knowing for Exam 1. Use your textbook‚ class notes‚ and past homework assignments in addition to this guide to prepare for Exam 1. 1. What are the differences between solids‚ liquids and gases with respect to molecular velocity‚ density‚ shape and volume?
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How Humans Impact Each Cycle EVS-1001 January 23‚ 2014 Brett Pierce Abstract Humans impact to the carbon cycle with the circulation of the carbon among many living organisms and their environment as well. The carbon dioxide that is surrounded will be synthesized by the plants and their tissue that is swallowed by animals with transforming in to carbon dioxide again while living or dead. The humans affect this cycle with taking 40% from the photosynthetic effect of plants on land. Where
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