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21 Cards in this Set
- Front
- Back
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percent composition
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the percent by mass of each element in a compound
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empirical formula
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the formula with the smallest whole-number ratio of the elements
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molecular formula
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a formula which specifies the actual number of eatoms of each element in one molecule or formula uni of the substance
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formula unit
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the simplest ratio of the ions represented in an ionic compound
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monatomic ion
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a one atom ion
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oxidation number
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the charge of a monatomic ion
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polyatomic ions
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ions made up of more than one atom
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oxyanion
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a polyatomic ion composed of an element, usually a nonmetal, bonded to one or more oxygen atoms
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oxyacid
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any acid that contains hydrogen and an oxyanion
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chemical reaction
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the process by which the atoms of one or more substances are rearranged to from different substances
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reactants
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the starting substances in a reaction
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products
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the substances formed during the reactions
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chemical equation
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a statement that uses chemical formulas to show the identities and relative amounts of the substances involed in a chemical reaction
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coefficient
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the number written front of a reactant or product in a chemical equation
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stoichiometry
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the study of quantitative relationships between amounts of reactants used and products formed by a chemical equation
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mole ratio
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a ratio between the numbers of moles of any two substances
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limiting reactant
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a reactant that limits the extent of the reaction and determines the amount of the product
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excess reactants
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the leftover reactants
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theoretical yield
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the maximum amount of product that can be produced from a given amount of reactant
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actual yield
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the amount of product actually produced when the chemical reaction is carried out in an experiment
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percent yield
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the ratio of the actual yield to the theoretical yield expressed as a percent
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