Purpose: I will identify an unknown liquid by obtaining an average density & boiling point for my liquid and comparing them with the known densities & boiling points of liquids in the CRC handbook of Chemistry & Physics. I will perform these experiments using three different measuring tools (graduated cylinder‚ burette & pipette) to evaluate the precision of each one. Results: Density 1‚ 2 & 3 calculated by using graduated cylinder to obtain volume. Density 4‚ 5 & 6 calculated by using volumetric
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23 May 2014 HIV AIDS Essay “People who are HIV positive should not have children”. I am in agreement with this statement and while some may view this as a violation of human rights‚ I think a strong argument can be made in favour of this statement. HIV is described as a pandemic. The Dictionary of Epidemiology defines a pandemic as “an epidemic occurring on a scale which crosses international boundaries
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Solubility as a Property of Matter A Lab of Chemicals‚ Chromatography‚ and Crime! Chemistry is a natural science that deals with the composition of matter and the changes it undergoes. At crime scenes‚ investigators often find unknown materials that need to be identified. If an unknown material is a mixture‚ an investigator may want to know one or two things about it: What are the ingredients of the mixture? Is the mixture found at the scene the same as a known mixture? A mixture is a collection
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First Aid TDA 2.2 2.1-Identify the signs and symptoms of common childhood illnesses. Common cold - Symptoms include: sneezing‚ runny nose‚ slight sore throat‚ occassional headaches and a temperature. Gastroenteritis(stomach bug) Symptoms include: Vomiting‚ temperature‚ diarrhoea(not on all occassions) and dehydration. Tonsillitis Symptoms include: A very sore throat‚ fever‚ aches including headaches/migraines. Scarlett Fever Symptoms include: Fever‚ loss of appetite‚ sore throat‚ pale
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Title: Thin-Layer Chromatography Objectives: Part1: 1. To learn the technique of TLC and the visualization of colourless components. 2. To identify an unknown drug by a TLC comparison with standard compounds. Part 2: To learn the separation technique by using Thin Layer Chromatography plate in separating a mixture of compounds into individual pure compound by using Spinach Leaf. Introduction: (i) General Concepts Chromatography is a common and powerful method used to separate and analyze complex
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HIV/AIDS Kusumojati 1206289874 Rendy Yonas 1206289823 Kharriz Abiyasa 1006806066 For English Presentation on 20th dec 2012. 1 1. What is HIV/AIDS? Acquired Immunodeficiency Syndrome (AIDS) is a disease caused by Human Immunodeficiency Virus (HIV). AIDS is a major concern in almost every country in the world. The World Health Organization (WHO) estimates that the cumulative number of AIDS cases in the world is up to 2.5 million persons. AIDS is the sixth leading cause of death among people
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Experiment 1: Viscosity of Liquids Victoria Kulczak Lab Partners: Laina Maines & Heidi Osterman Date of Lab: 2/21/11 Due Date: 2/28/11 Abstract: The goal of this experiment was to determine the viscosity of given liquids. Two different methods were employed‚ the first measures time of flow of several methanol-water solutions‚ from point A to point B. The second method involves dropping a foreign object‚ in this case a sphere‚ into a cylinder of glycerol and measuring the time it takes for it to
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development of the Band-Aid and its spreading significance after WWII. Introduction I. Attention Getter: Who hasn’t used a Band-Aid? It would be impossible not to in a world full poor judgment‚ reckless behavior‚ and clumsiness. II. Speaker Credibility: I’m sure all of us can think of a time probably recently that you have needed a Band-Aid. III. Relevance to Your Audience: As someone who is a frequent user of Band-Aids‚ I have done research on the invention of the Band-Aid and will share it with
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Spread of AIDS Every day we read in newspapers that more people are getting a disease. But no a simple disease. Nowadays AIDS is one of the most lethal illness that every year kills thousands of people. Acquired immunodeficiency syndrome‚ commonly referred to as AIDS‚ is a fatal disease as it attacks and destroy the immune system of the body. As per the reports of Indian Health Organization (IHO)‚ women and children are found to be more prone to the disease. The highest numbers of AIDS cases are
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colleague. Today my partner and I are here to debate on the topic ‘Be it resolved that countries who supply foreign aid should reallocate their resources to development at “home”. In this case‚ we define “home” as the countries that supply foreign aid to others‚ countries that instead could be investing their money into themselves and improving upon their own country. The term foreign aid refers to financial assistance that is provided on intergovernmental or international level. It involves the transfer
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