Observations of Chemical and Physical Change PART 1 – OBSERVATIONS OF CHEMICAL CHANGE No credit will be given for this lab report if the Data section is not completely filled out and if the required photographs are not received. At least one photograph must show the student’s face. OBJECTIVES 1. Observe physical and chemical changes. 2. Define physical and chemical change. 3. Identify the relationship between a chemical change and a chemical reaction. 4. Observe several indicators of a chemical reaction
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Case 3: The Grayson Chemical Company The Company The Grayson Chemical Co. manufactured industrial chemicals for sale to other industrial companies. The company was about 40 years old and had been run by a stable management under only two presidents. Within the past few years‚ however‚ declining earnings and sales had brought pressure from the board of directors‚ investment bankers‚ and stockholder groups to name a new president. The company had grown increasingly stagnant – although at Grayson
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The definition of weathering is to wear away or change in appearance or texture due to long exposure to air. This concept is also applicable to the human body. This is called the weathering hypothesis. The weathering hypothesis was coined by Dr. Geronimus‚ which states that African Americans in the United States experience early health deterioration‚ measured by biological indicators of repeated exposure to and adaptation to stressors (Geronimus‚ Hicken‚ Pearson‚ Seashols‚ Brown‚ & Cruz‚ 2010). Dr
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To What Extent Were Chemical Weapons Effective in World War II? Word Count: 1701 Table of Contents A. Plan of Investigation 3 B. Summery of Evidence 4-6 C. Evaluation of Sources 6-7 D. Analysis 8-9 E. Conclusion 9-10 F. Bibliography 11-12 To What Extent Were Chemical Weapons Effective in World War I? A. Plan of Investigation This investigation will assess the extent that chemical weapons were effective in World War I. In order to do so‚ this investigation will
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experiments in order to determine which combination of chemicals produce the brightest and longest lasting light‚ through chemiluminescence. Chemiluminescence can be defined as the emission of light by a chemical reaction that does not produce heat. Chemiluminescence can also be found in nature‚ where it is referred to as bioluminescence. This can often be found in many deep sea fish‚ algae‚ and fireflies. Luminol is one of many chemicals that can be used to create chemiluminescence outside of
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What is it? Dysprosium is a silver-white chemical element discovered in 1886 by a French scientist named Paul-Émile Lecoq de Boisbaudran. It wasn’t isolated until a different separation technique (ion-exchange) developed in the 1950s by a Canadian scientist Frank Spedding and his team. This rare element it is never naturally found. It is only made chemically. It can be found in minerals such as xenotime. Dysprosium is a member to the lanthanide family on the periodic table just like all the other
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Reactions & Nuclear Chemistry Assessment Task Assignment Question 1 Produce a summary reactions sheet for all the chemical reactions encountered in production of materials. Your summary should contain the following components a) Name of reaction b) General word equation c) Balance formulae equation d) An example of the reaction Question 2 What types of instruments and processes are used to detect radiation? The properties of nuclear radiation are used to detect their
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LOGOS INTERNATIONAL SCHOOL INNOVATORS CAUGHT IN ACTION: HOW DOES CHEMICAL ENGINEERING AFFECT THE SUDDENLY CHANGING WORLD? Ponhneath Nguon College and Careers Preparation Class Mr. Barrett “But innovation comes from people meeting up in the hallways or calling each other at 10:30 at night with a new idea‚ or because they realized something that shoots holes in how we’ve been thinking about a problem.” -Steve Jobs. It is quite unbelievable how the world has changed so rapidly over the last
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Tuscon was a long and miserable drive. It had just rained the night prior so the air was hot and muggy. The sweat clung on to you like glue‚ and was impossable to peal off. The only thing holding my sanity together is the book I brought with me‚ Weathering Heights. Otheirwise I would have jumped out of the car an hour ago. Right now I can imagine my two friends Stefanie and Alex sitting in their bedrooms under the artic blast of their aircondetioner. Oh how I wish I was within the radious of a working
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Mixing of two solutions. 55 Class IX EXPERIMENT No: 9 AIM: To study the external features of root‚ stem‚ leaf and flower of monocot and dicot plants. Material Required : Plants of Hibiscus/Peturnia/rose/pea and grass/maize/bamboo/lily or‚ any other ornamental herb with flower and fruits‚ simple or dissecting microscope‚ hand lens‚ slide‚ coverslip and razor /blade. Procedure : 1. 2. 3. Observe the differences in the external features of stem‚ leaf‚ root‚ flowers and seeds. To study the leaf‚ see
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