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16 Cards in this Set
- Front
- Back
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Mole |
A quantity of 5.02 × 10*23 units of a substance; the amount of a substance equal to the sum of the atomic masses in grams; Avogadro's number |
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Formula mass (FM) |
The sum of the atomic masses of a substance in a.m.u. |
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Gram formula mass (GFM) |
The sum of the atomic masses of a substance in grams |
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Coefficient |
The integer that appears in front of an element, molecule, or compound indicating the number of moles present in a chemical equation |
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Subscript |
The integer to the lower right of an element which indicates the number of moles of atoms present in one mole of the compound |
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Species |
The individual products and reactants in a chemical reaction |
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Law of conservation of mass |
In any chemical reaction, mass can neither be created nor destroyed, it can only be changed from one form to another EX: Energy stored in bonds is released as heat when the bonds are broken |
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Balanced equation |
A chemical reaction in which the number of moles of each ELEMENT on the products side |
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Synthesis reaction |
A chemical reaction in which two or more substances combine to form a compound EX: A + B ---> AB |
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Decomposition reaction |
A chemical reaction in which a compound is broken down into simpler substance EX: AB ---> A + B |
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Single-replacement reaction |
A chemical reaction in which a metal replaces a metal or a nonmetal replaces a nonmetal within a compound EX: A + BC ---> AC + B |
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Double-replacement reaction |
A chemical reaction in which a metal replaces a metal AND a nonmetal replaces a nonmetal within two compounds; two compounds "trade" elements EX: AB + XY ---> AY + XB |
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Law of conversation of energy |
In any chemical reaction, energy can neither be created nor destroyed, it can only be changed from one form to another EX: Energy stored in bonds is released as heat when the bonds are broken |
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Molecular formula |
Formula for a compound which provides the number and identity of the atoms of each element present EX: C6H12O6 |
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Empirical formula |
Formula for a compound which provides the simplest ratio of the elements present EX: The empirical formula for thr molecule C6H12O6 is CH2O |
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Percent mass |
% composition by mass = (mass of part/ mass of whole) ×100 |
