Atom Bonding Lab Introduction: Atoms bond in covalent bonds and ionic bonds. A covalent bond is when atoms share electrons in order to gain stability with each other (Larsen). To have stability which each other‚ the atoms share electrons so that their outer electron shell is equal. Ionic bonding is the complete transfer of valence electron(s) between atoms. It is a type of chemical bond that generates two oppositely charged ions (Larsen‚ 2010). Element that have a positive ion are able to bond
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SAMPLE REPORT: The ‘Stylish’ Report i) ii) Look at the assignment instructions below Now read the sample report. Read the accompanying comments on the side as you go. iii) Is this is a well-written report in your view? Could it be improved in any way do you think? ASSIGNMENT 2: The Stylish Report Background Colin Coif and Pamela Perm are the owners and operators of a hairdressing business Stylish specialising in ‘high end’ quality hairdressing services. Currently they operate two salons in
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experiment is to differentiate between a physical change and a chemical change. A physical change includes a change in the material without affecting its composition‚ such as the physical state change. However‚ a chemical change includes the change in the composition of the substance. The change in color‚ formation of a gas or a solid product‚ and the production of energy are the evidences of a chemical reaction‚ thus‚ of a chemical change. Materials Crucible tongs Evaporating dish
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Torque and Equilibrium Purpose: Apply principle of static equilibrium to determine a coefficient of friction. Research Question: What is the coefficient of friction between a meter stick and wall? Hypothesis: Tying a piece of string on to the end of a meter stick‚ put the other end of the meter stick against the wall so that the meter stick is horizontal and does not slide down the wall. Hang a weight on the meter stick sliding it to a point where the meter stick is about to come off from
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2013 Palmitos‚ Isabel Experiment # 2 chemical changes I. INTRODUCTION Chemical changes occur when a substance combines with another to form a new substance whether by combination reaction‚ combustion reaction‚ decomposition reaction and etc. These changes can be observed by evolutions of gas‚ appearance or disappearance of a precipitate‚ evolution or absorption of heat or even change in color. This experiment aims to observe the different chemical changes copper undergoes in different conditions
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Sample Report The Power to Understand. 800-211-8378 • PsychCorp.com Technical Report for DAS-II and WIAT-II (School Age Battery) Examinee: Age: Date of Birth: Examinee ID: Gender: John Sample 8 years‚ 5 months 2/11/1999 1 Male Report Date: Grade: Ethnicity: Examiner: 7/19/2007 Not Specified White not Hispanic Origin Sandra Behrens Spanish Home Language: Dominant Language: Translation Used: Test Administered: DAS-II (1/11/2007) WIAT-II (1/11/2007) Handedness: School: Teacher: Age at
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Introduction The reaction rate of a chemical reaction is determined as the change in the concentration of a reactant or product over the change in time. [1] The rate of a reaction is determined by experiment. Many factors influence the rate of a reaction: the nature of the reaction‚ concentration‚ pressure‚ temperature‚ and surface area‚ presence of catalyst and intensity of light. [2] For a chemical reaction‚ the rate law or rate equation is a mathematical expressed equation that links the reaction
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Industrial Separation Research a) Identify a mixture that is separated industrially: Olive oil b) Identify which ‘sphere’ it is obtained from: Biosphere c) Identify the industrial separation processes used on this mixture: Crushing/grinding: The olive fruit is crushed and ground by a metal hammer in a mill to make a paste. Beating: The olive fruit paste is added to water is additionally beaten to extract more oil from the olive cells. Salt can be used to assist osmotic breakdown [of the cells]
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Le Chatelier’s principle and chemical equilibrium systems Jan Samuel Matuba‚ Mark Cel Gonzaga Chemical Engineering Department‚ College of Engineering‚ University of the Philippines‚ Diliman 1100 ------------------------------------------------- January 11‚ 2012 DISCUSSION Reaction rates determine the speed at which products are formed from the reactants. Expressed as concentration divided by time‚ reaction rates measure the rate of disappearance of the reactants‚ and‚ conversely‚ the rate
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Materials & Methods: This aim of this experiment was to determine whether or not a chemical reaction occurred after the mixing of various chemicals. The evolution of a gas‚ the formation of precipitation‚ and the change of temperature or color are all indicative of a chemical reaction. It was assumed that a reaction did not take place if the mixture of chemicals exhibited none of these characteristics. Several precipitation‚ complex-ion formation‚ redox‚ and acid-base reactions were performed.
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