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| the relationships among the quantities of reactions and products involved in chemical reactions |
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| a representation of a chemical reaction using the chemical formulas of the reactants and products; a balanced chemical equation contains equal numbers of atoms of each element on both sides of the equation |
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| a starting substance in a chemical reaction; it appears to the left of the arrow in a chemical equation |
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| a substance produced in a chemical reactions; it appears to the right of the arrow in a chemical equation |
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| a chemical reaction in which two or more substances combine to form a single product |
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| a chemical reaction in which a single compounds reacts to give two or more products |
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| a chemical reaction that proceeds with evolution of heat and usually also a flame most combustion involves reaction with oxygen, as in burning of a match |
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| the mass of the collection of atoms represented by a chemical formula. for example, the formula weight of NO2 (46.0 amu) is the sum of the masses of one nitrogen atom and two oxygen atoms |
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| the mass of the collections of atoms represent by the chemical formula for a molecule |
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| the number of 12C atoms in exactly 12 vg of 12C; it equals 6.022*10^23 mol-1 |
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| a collection of Avogadro's number (6.022*10^23) of objects; for example, a mole of H2O is 6.022*20^23 H2O molecules |
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| the mass of one mole of a substance in grams; it is numerically equal to the formula weight in atomic mass units |
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| (limiting reagent) the reactant present in the smallest stoichiometric quantity in a mixture of reactants the amount of product that can form is limited by the complete consumption of the limiting reactant |
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| the quantity of product that is calculated to form when all of the limiting reagent reacts |
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| the reaction of the actual (experimental)yield of a product to its theoretical (calculated) yield, multiplied by 100 |
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