Chapter 1 : Matter, Measurements, and Problem Solving

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CHEM 1150
Eli Hvastkovs

General Chemistry (CHEM 1050) Chapter 1 DEFNITIONS: Chemistry: science that seeks to understand the behavior of matter by studying the behavior of atoms and molecules Matter: substance that takes up space and has mass Physical changes do not alter the order of atoms in a molecule Phase changes: -solid to liquid -liquid to gas -solid to gas (sublimation) -solid dissolving into another liquid substance -liquid mixing into another liquid substance Physical properties: smell, taste, appearance, melting point, boiling point, density Chemical changes alter how atoms are connected in a molecule Law of conservation of energy states energy can neither be created nor destroyed. Precision: how close successive measurements are. (ie. 6.23, 6.20, 6.17) Accuracy: how close measurements are to what they should be. SI UNITS T – tera 1x10 12 1,000,000,000,000 G – giga 1x10 1,000,000,000, M – mega 1x10 1,000,000 k- kilo 1x10 1,000 h- hecto 1x10 100 d- deca 1x10 101 base d – deci 1x10 .1-1 c- centi
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