Chapter 1: Introduction - Matter and Measurement

Flammability corrosiveness reactivity with acid etc

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Flammability, corrosiveness, reactivity with acid, etc.
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1/15/10 Properties of Matter In tensive Properties: Independent of the amount of the substance that is present. Density, boiling point, color, etc. Ext ensive Properties: Dependent upon the amount of the substance present. Mass, volume, energy, etc.
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1/15/10 Changes of Matter Physical Changes: Changes in matter that do not change the composition of a substance. Changes of state, temperature, volume, etc. Chemical Changes: Changes that result in new substances. Combustion, oxidation, decomposition, etc.
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1/15/10 Chemical Reactions In the course of a chemical reaction, the reacting substances are converted to new substances. Compounds can be broken down into more elemental particles.
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1/15/10 4. Physical of Chemical change? A. dissolution of a penny in nitric acid B. a burning candle C. the formation of polyethylene from ethylene D. the rusting of iron E. melting of lead F. dissolving sugar in water G. crushing of stone
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1/15/10 5. Intensive or extensive property? A) density B) temperature C) melting point and boiling point D) mass
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1/15/10 Separation of Mixtures
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1/15/10 Filtration: Separates solid substances from liquids and solutions. e.g. Sand in water.
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1/15/10 Distillation Separates a homogeneous mixture on the basis of differences in boiling point. e.g. alcohol and water.
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1/15/10 Chromatography Separates substances on the basis of differences in solubility in a solvent.
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1/15/10 6. A separation process that depends on differing abilities of substances to form gases is called __________. A) filtration B) distillation C) chromatography D) all of the above are correct
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1/15/10 7. Which one of the following is often easily separated into its components by simple techniques such as filtering or decanting? A) heterogeneous mixture B) compounds C) homogeneous mixture D) elements E) solutions
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1/15/10 Units of Measurement
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1/15/10 SI Units Système International d’Unités ( SI ) Uses a different base unit for each quantity
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1/15/10 Metric System Prefixes convert the base units into units that are appropriate for the item being measured.
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1/15/10 Temperature A measure of the average kinetic energy (hotness or coldness) of the particles in a sample.
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