Aspirin. charge that attracts to the positively charged hydrogen. A more stable structure is formed when the charge on the oxygen moves from being a lone pair to forming a double bond and the ether substituents are removed. In the presence of Hydronium‚ the negatively charged oxygen shares electrons with a hydrogen from the reagents. This mechanism allows for the formation of Salicylic Acid. When Acetic Anhydride is used as a reagent‚ the double bond on the ketone is transferred as a charge to the
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Chapter 1 The Chemical World Chemistry a science that studies matter – its properties and changes. Matter is anything that has mass and takes up space. Matter is made up of atoms and molecules. Scientific Method Observation of nature → Hypothesis (possible explanation) → Experiments to confirm or revise hypothesis Many observations lead to scientific law – a statement of the relationship between different parts of nature. Ex: law of conservation of mass- “ matter is neither created or destroyed”
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Batteries‚ Resistance and Current “Battery-Resistor”: Check “show battery” and “show cores”‚ watch what happens‚ adjust some variables 1. Why do electrons (blue dots) move? Draw a diagram of the battery‚ label the flow of electrons. The flow of current (+) is opposite; draw this and note if toward or away from + terminal of the battery. The electrons move because of the battery voltage. The current flows in the opposing direction of the electrons and the electrons flow towards the positive
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Date: 25th March‚ 2010 Title: Investigating the capacitance of a parallel-plate capacitor using a reed switch Objective: To investigate the factors which affect the capacitance of a parallel-plate capacitor using a reed switch. Apparatus: - reed switch - signal generator - capacitor plates of area about 0.24m X 0.24 m 1 pair - polythene spacers ( 10 X 10 X 1 mm ) - polythene sheet‚ same area as capacitor plate 1 mm thick - battery box with 4 cells
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town life is also one of its positive aspects. This would be the fact that everyone knew everyone else. A girl that I knew went away to college for a semester. At school she got arrested falsely but was eventually acquitted of all charges. However in the small town that I was from everyone had fabricated their own story about what happened. This is my highest complaint with small towns. I have spent a considerable amount of time in both a small town and a large city
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have a neutral charge. Neutrons are also one amu like protons. Neutrons can move from the nucleus of an atom making an atom an isotope. The neutron symbol is . Electrons are located outside the nucleus in energy levels. Electrons have a negative charge and weigh approximately 1/2000th of an amu. The weight is almost insignificant. Electrons can vary in an atom making cations and anions. Cations are a positive charge when an atom loses an electron. Anions are a negative charge when an atom gains
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article it explains that all matter is made up of atoms which are made up of smaller particles called the proton‚ the neutron‚ and the electron. It states that electrons have a negative charge and protons have a positive charge. There
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* Wall mounted split type air-con 2.5 TR 1 unit Total No. of units 23 units INCLUDES: Four (4) times a month visit on a weekly basis to perform the following: * Check-up‚ cleaning of filters‚ checking of Freon charge and additional charging (if applicable)‚ monitoring of ampere‚ check-up controls‚ drain line cleaning‚ trouble shooting and repair of minor problems * Monthly maintenance report * General cleaning on a quarterly basis * 24/7 availability
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The 3 Pin Plug The three pin plug is the most commonly used and one of the most important devise we use every day. Although it is an simple devise it is the most impotent part of any electrical object we use. And as we are getting more and more dependent on technology the plug is becoming increasingly important in our lives. Explosion View: [pic] List of components and material used: |Name |Material |Purpose
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CHEM 208 Module 2: List the steps of the scientific method: Scientific Method: performing a study in organized step: (led to enunciation of Law of Conversation of Mass and Matter) 1. Performing experiments: a. An experiment is a set of steps (procedures) that are performed under controlled
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