The Chemistry of Life 3.1 Chemical Elements and Water 3.1.1 State that the most frequently occurring chemical elements in living things are carbon‚ hydrogen‚ oxygen and nitrogen. Carbon‚ hydrogen‚ oxygen and nitrogen are the most frequently occurring chemical elements in living things. 3.1.2 State that a variety of other elements are needed by living organisms‚ including sulphur‚ calcium‚ phosphorus‚ iron and sodium. Other elements are needed by living organisms including sulphur‚ calcium
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temperature‚ pressure‚ mass or a mechanical or electrical change in a substance as moisture is absorbed. By calibration and calculation‚ these measured quantities can lead to a measurement of humidity. Modern electronic devices use temperature of condensation (the dew point)‚ or changes in electrical capacitance or resistance to measure humidity differences. The first practical hygrometer was invented by polymath Johann Heinrich Lambert in 1755. Metal-paper coil type[edit] The metal-paper coil
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Decomposition 3) Phase changes: 3. Synthesis a) Solidification: From Liquid phase to Solid phase 4. Precipitate b) Fusion: From Solid phase to Liquid phase c) Condensation: From Gas phase to Liquid phase d) Evaporation: From Liquid phase to Gas phase e) Deposition: From Gas phase to Solid phase f) Sublimation: From Solid phase to Gas phase Example: Freezing water will change its phase from liquid to solid
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acids and glycerol are the sub unit of most lipids. In the synthesis of a fat or oil three fatty acid molecules combine with one molecule of glycerol to form a triglyceride. Triglycerides make up about 95% of all dietary fats. This is formed by condensation (water is lost). Triglycerides are the chemical form in which most fat exists in food as well as in the body. They’re also present in blood plasma and‚ in association with cholesterol‚ form the plasma lipids. Fig 1.0 shows the structure
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Abstract Pyrorle-2-aldehyde and 1‚3-diaminopropane react under reflux to form a transition metal ion of Nickel(II)‚ that further more react with nickel acetate to form red crystals through condensation‚ the colour being constituded by the congugated bonds. These series of reactions synthesize the Schiff Base ligand and Nickel(II) complex of the Schiff base ligand. 0.36g of the Schiff base ligand is yielded and 0.1g of the nickel complex is yielded from the 0.36g Schiff base ligand and 0.5g nickel
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Yeast and Sugar - The Chemistry must be right Jansen‚ C. Gymnasium Felisenum‚ The Netherlands 14-04-2010 Summary Yeast can metabolize sugar in two ways‚ aerobically‚ with the aid of oxygen‚ or anaerobically‚ without oxygen. In this experiment yeast ferment sugars anaerobically. When yeast ferments the sugars anaerobically‚ however‚ CO2 production will cause a change in the weight of the sugar/yeast-solution. This raises a further question: What is the effect of different kinds of sugars
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quantities for commercial use as artificial fruit essences and other flavorings and as components of perfumes. Esterification is used to derivatize carboxylic acids and other acidic functional groups. In a typical reaction‚ Esterification involves the condensation of the carboxyl group of an acid and the hydroxyl group of an alcohol‚ with the elimination of water. Many Esterification reactions are slow and elevated temperatures are frequently used. Since the Esterification reaction is an equilibrium reaction
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Scientific Method: 1) What is the scientific method? The scientific method is a way to ask and answer scientific questions by making observations and doing experiments. 2) What are the steps of the scientific method? Ask a Question‚ Do Research‚ Hypothesis‚ Test Your Hypothesis by Doing an Experiment‚ Analyze Your Data‚ Draw a Conclusion‚ And Communicate Your Results. 3) Why do scientists use the scientific method? What are the benefits of using it? Scientists use this method to have a formula
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Chapter 15: • Matter is anything that has mass and takes up space. – Ex: Your textbook‚ you‚ your pen/pencil‚ air‚ etc. • Classification systems are used all the time to organize objects. – Ex: The Periodic Table of Elements‚ organizing your locker‚ your clothes‚ etc. • In order to make the study of matter easier to understand‚ scientists have developed ways to classify matter. • The properties of materials can be used to classify them into general categories. – Ex: Pure substances‚ elements
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Dream Perspectives November 28‚ 2011 Abstract This paper will explore the three perspectives of dreaming. The psychoanalytic perspective‚ the cognitive perspective and the biological perspective. The psychoanalytic perspective‚ as conveyed by celebrated neurologist and founding psychoanalyst Sigmund Freud‚ is examined through his literary work The Interpretation of Dreams. This book serves as the basis of the psychoanalytic perspective which the other perspectives
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