Lab # 3 Chemistry 101 Physical & Chemical Properties Purpose To examine the physical and chemical properties of multiple natural chemical substances‚ and to determine which changes are chemical and which are physical. Data Solubility or Reaction | SubstanceName | Color | Odor | Effectof Heat | ColdH2O | HotH2O | LitmusTest | DiluteHCl | DiluteNaOH | Mg | Silver | Odorless | Slight change of color and expansion | No Reaction | Substance became
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Performed: 02/05/2013 Submitted: 02/06/2013 Section 1: Title Physical and Chemical Properties Section 2: Purpose This labs is intended to help me investigate chemical and physical properties of pure substances. Section 3: Procedure In this experiment‚ I observed substances in their natural state‚ and recorded their apparent physical properties. I then tested the substances to determine how they react when their natural environments were altered. The pure substances were tested to see
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Does every Silver Lining have a Cloud? The construction market in the UAE poses many challenges: the number and scale of projects have generated a tremendous demand for construction services; the weakening of the US dollar against other major currencies coupled with other inflationary factors has further increased the cost of construction; and the potential impact on the global economy caused by difficulties in the US sub-prime market has created much uncertainty amongst investors. These issues give
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This experiment was performed to demonstrate a cycle of chemical reactions involving copper. This lab will start with copper as a reactant in the first reaction through a series of five chemical forms of aqueous phase reactions and ending to calculate the percentage of recovered solid copper as a product in the last reaction of the experiment. The experiment resulted in a percent recovery from the cycle of copper reactions of an increase to 139%. . Introduction: The purpose of this experiment is
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CHEMICAL MEDIATORS OF INFLAMMATION Cell derived mediators Mediator | Source | Function | Vasoactive amines | Histamine | Mast cells‚ basophil‚ platelet | Vasodilation‚ ↑ vascular permeability‚ endothelial activation | Serotonin | platelets | Vasodilation‚ ↑ vascular permeability | Eicosanoids | Prostaglandins | Mast cells‚ leukocytes | Vasodilation (PGD2‚PGE1‚E2 & PGF2-α)‚ pain (PGE2)‚ fever | Thromboxane A2 | | Promotes platelet aggregation‚ vasoconstriction | Prostacyclin
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4/4/2013 Food Preservation Methods Food Preservation Using Chemicals SMY04032012 A naturally / synthetically produced substances that is added to food/beverages to prevent spoilage Preservatives: The good‚ bad and ugly! 1 4/4/2013 Sometimes‚ food may spoil because of the changes in the food itself. When food spoils‚ the following may change: • appearance • taste • texture • odour © Food – a fact of life 2007 Food may become unsafe to eat. Micro-organisms need certain
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Physical and chemical ProPerties Physical and Chemical Properties Lab RepoRt assistant This document is not meant to be a substitute for a formal laboratory report. The Lab Report Assistant is simply a summary of the experiment’s questions‚ diagrams if needed‚ and data tables that should be addressed in a formal lab report. The intent is to facilitate students’ writing of lab reports by providing this information in an editable file which can be sent to an instructor. Substance Name Mg Cu Zn
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“The Golden Kite‚ The Silver Wind‚” by Ray Bradbury presents a surface story to its readers. Each town has a border which surrounds their town and is shaped in a certain way. The walls are used to see who is the most powerful and strongest. For example‚ a town called Kwan-Si has a wall shaped like a pig and another town has the shape of an orange. The Mandarin‚ an official in the Chinese Empire‚ says that the pig can devour the orange at any moment. This means that more people are going to show up
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Bipolar Disorder as Portrayed in Silver Linings Playbook According to the National Institute of Mental Health‚ bipolar disorder is defined as having unusual shifts in mood‚ energy‚ activity levels‚ and the ability to carry out day-to-day task. There are several different types of bipolar disorder including: bipolar I disorder‚ bipolar II disorder‚ and cyclothymic disorder (“Bipolar Disorder‚” 2014). The signs and symptoms for each bipolar disorder slightly vary. However‚ the main sign and symptoms
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and scientific centers. Animal testing is wrong and downright mean. Innocent animals should not be treated badly and caused pain for the sake of a human ’s safety. Many people think animal testing is good while others think it is wrong. I think it is completely and absolutely wrong. Some people argue that humans are not necessarily superior to animals‚ so why should animals be experimented on and made to suffer to protect human beings? Do you know what animal testing is‚ what condition the animals
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