Objectives: 1. To identify the relative densities of some common liquids and solids. 2. To determine the densities of water‚ an unknown liquid‚ a rubber stopper‚ and an unknown rectangular solid. 3. To determine the thickness of a piece of aluminum foil using the density concept. 4. To practice proficiency in performing the following experimental procedures: pippeting a liquid‚ weighing by difference‚ and determining a volume by displacement. Apparatus: Tall glass cylinder‚ glass marble‚ rubber
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Experiment no. 2 Classification of Matter Morillo‚ Mary Jane J. Nidua‚ Maria Angelene Group no. 2/Chemistry Lab./Engr. Ma. Jeanette U. Obias Abstract The classification of matter was demonstrated through simple activities of mixture‚ heating and magnetic attraction describing its physical state ‚ its chemical reactions and its separation to other substances. Simple reagents such as Iron filings and Sulfur powder in our experiment were considered as elements‚ while solid mixtures such
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BALANCE LAB Introduction The purpose of this lab is to become familiar with how to use the ChemLab program for determining mass using both the centigram balance and the electronic balance. Using the centigram balance‚ the mass‚ in grams‚ of a copper slug will be determined by both direct weighing and weighing by difference techniques. Using an electronic balance‚ the wight of a copper slug will be determined by also utilizing direct weighing and weighing by difference. Average mass of a
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Name: _______________________ 7.04 Equilibrium Data and Observations: Insert data tables for each part of the lab (parts I‚ II‚ and III). Part I (2 points) Round Candies on R side Candies on P side 0 40 0 1 25 15 2 19 21 3 17 23 4 16 24 5 16 24 6 16 24 7 16 24 8 16 24 9 16 24 10 16 24 Part II (2 points) Round Candies on R side Candies on P side 0 40 0 1 38 23 2 30 32 3 27 35 4 26 36 5 25 37 6 25 37
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Give brief answers to the following questions : 1. What happens to a molecule when it absorbs UV light ? rvv’ill occra’’ 6e cfr’oh fvhan ?- rr.ote c ulQ a$c‚ovb r4V t;g hl ‚ ?*rltdfi’oh o{ olQelraq ofc pronrottd potn *h’Qhr lraur1 dt *q‚fe to erc;feC‚ slst<‚Th<;6bSotb1 ) qh’:o&s ih n^olf c’‚la g r.in9 qb‚olal ob{‚1tr.ira :Lind c o1 et<cif l‚pln+t qt"d QqCh W-qrtr\ve 1t5 ou‚ 4iSfictlre ancvcry.0rl+yorvi6lst: qnI vrstblC t;Jht brin3 lboql rrrovc tbq\i v orl{rrro e.tCclro tts t5 Ricorlt5 fu o rv
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EXPERIMENT 5- A FISCHER ESTERIFICATION SYNTHESIS OF PEAR OIL One of the major uses of Esterification (C(=O)-C-R) is forming compounds with different odors which can be used to make different synthetic and natural flavorings. Using the chemical and physical properties of organic compounds‚ an ester was catalyzed from the reaction of a carboxylic acid with an alcohol‚ producing an odor similar to that of pear oil. The mechanism of this Fischer- Esterification process is outlined as follows:
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PS 102 Final Exam Draft Copy Please note: in addition to many of the following multiple choice questions‚ there will be additional questions with regard to the assigned article on executive agreements and the assigned article on education policy‚ as well as more questions pertaining to the unit on public policy. Also‚ at the end of the study guide are the two essay questions that will be on the exam. Please note: the essay questions are multiple part questions and should be answered completely
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Cerritos Community College “My Critical Reflections on Cage Fighting” Philosophy 102 Tifarrah Williams Professor J.A. van de Mortel January 27‚ 2015 The morality and legality of cage fighting is a subject that is very tough to argue‚ specially depending on whom you are conversing with. I‚ myself‚ for example choose not to get into this topic with my friends‚ because they all are obviously for it. This paper will examine my personal thoughts and feelings about this subject against ‘Traits of Moral
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Rafa Mwais Professor Hermann Chem 157 Paper #5 May 28‚2013 Crystal Structure of the Catalytic Portion of Human HMG-CoA Reductase 3-hydroxy-3methylglutaryl-CoA reductase (HMGR) catalyzes the formation of mevalonate in the biosynthesis of sterols and isoprenoids. The activity of this enzyme is regulated physiologically through synthesis‚ degradation and phosphorylation to maintain to maintain the concentration of the mevalonate-derived products. Transcription and translation of HMGR increase
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Nikki Le Anthro 102 Alyson Rollins Assignment #1 #1 Jared Diamond presents many hypotheses in the article “Curse and Blessing of the Ghetto”. The four main points he brings up is that a new mutation could be arising as the old copies of Tay-Sachs disappear. Secondly‚ Diamond believes that this gene could help fight against tuberculosis. Third‚ people who already possessed this Tay Sachs gene at a high frequency could have easily acquired this gene. Lastly‚ Diamond believed that this gene originated
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