Discussion for Experiment 1 (Basic Laboratory Operations and Identification of a compound : Chemical Properties) In the first experiment‚ the precision of instrument was studied by measuring the mass of water for several times. The result shows that the mass measurement of the balance is precise since the masses of water in six trials are somewhat close. The reason that the masses of water in each trial are not identical may come from the high sensitivity of the balance that keep fluctuating due
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15 January – About 6 million are unemployed in Germany. 25 February – Adolf Hitler obtains German citizenship by naturalization‚ opening the opportunity for him to run in the 1932 election for Reichspräsident. 10 April – Paul von Hindenburg is elected president of Germany. 30 May – Chancellor Heinrich Brüning resigns. President Hindenburg asks Franz von Papen to form a new government. 14 June – Bans against the SS and SA are overturned. 17 July – Altona Bloody Sunday: In Altona‚ armed communists
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Microbiology UNKNOWN LAB REPORT Kateryna Petrakova INTRODUCTION Microorganisms cause a great amount of diseases. For healthcare providers it is very important to be aware of what organisms are pathogenic and cause a disease and‚ therefore‚ to find an appropriate treatment. Different microorganisms require various environments in order to replicate and to become dangerous for a person’s health. An integral part of any medical treatment is to be able to recognize and
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Pollution problems that are serious but that are relatively unknown Many kinds of pollution exist worldwide. Many familiar pollution problems are known to many people such as pollution from the garbage‚ air pollution from cars and industry‚ pollution released into water from the factories and so on. There are many occurring spots worldwide that serious pollution problems have taken place‚ but do you wonder where those places are? Some of the significant scenes are worth knowing. Here are some scenes
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Identification of a Hydrate Based on Percent Water Varun Wadhwa 11/19/12 Introduction The identity of an unknown hydrate was determined by massing the hydrate before and after heating and calculating the percentage of water. Procedure First‚ we cleaned‚ dried and heated an evaporating dish for five minutes on an iron ring with the Bunsen burner and massed it. Then‚ we added 2 grams of an unknown hydrate and calculated the mass of that. Next‚ we used gradually increasing heat for
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Separation and Identification of Plant Pigments by Paper Chromatography Biology 1107L Introduction All living organisms require energy for their chemical processes. The ultimate source of this energy is the sun. Plants convert light energy into the chemical energy of sugars. During photosynthesis pigments are used to capture light energy. Pigments of green plants can easily be separated and identified using a technique called paper chromatography. The purpose of this
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Name the minerals below. Then‚ insert a percentage of how certain you are in your identification. Finally‚ explain your percentage of certainty: What was confusing about this mineral? What other minerals do you think it could be? Remember‚ the minerals in the virtual lab include seven of the following: borax‚ calcite‚ corundum‚ graphite‚ gypsum‚ orthoclase feldspar‚ pyrite‚ quartz‚ talc‚ and topaz. Identification of Mineral Percent Certain Explanation of Certainty Example: Fluorite 80% certain
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Facebook ; the good the bad and the unknown Facebook is a social network service and website that was launched in February 2004 it is operated and privately owned by Facebook‚ Inc. As of this year‚ [updateFacebook has more than 500 million active users. It is a great online source for keeping up with your friends‚ finding friends with similar interests‚ staying in touch with loved ones all over the world‚ and sharing things in your life with the people you care about. But when is sharing and
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The identification of an unknown bacterial environmental isolate through a series of morphological‚ physiological and differential exercises. The purpose of the environmental isolate report is to learn what is necessary in order to take an unknown environmental isolate (EI) and identify it. This was achieved through a series of exercises that provided information on the morphological‚ physiological and biochemical traits of the EI which were then compiled and interpreted in order to make a presumptive
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Case Study Report for Unknown #49 A new school for girls was opened in a larger village in Northern Pakistan‚ and the teachers were proud to have convinced many families in the surrounding villages to allow their daughters a basic education. The school was a success‚ and the 6-10 year olds girls quickly learned how to read and write and were even instructed in the sciences. However‚ 2 weeks before summer break‚ many of the girls and the teacher developed breathing problems that included severe coughing
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