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Unit 3 chem vocab

TermDefinition
Balanced equation A chemical equation in which the number of moles of each element on the reactants side is equal to the number of moles of each element on the products side.
Coefficient The integer that appears in front of an element, molecule, or compound indicating the number of moles present.
Decomposition reaction A chemical reaction in which a compound is broken down into simpler substance Ex: AB a A+B
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 a AY+XB
Empirical formula Formula for a compound which provides the simplest ratio of the elements present
Formula mass (FM) The sum of the atomic masses of a substance in a.m.u.
Gram formula mass (GFM) The sum of the atomic masses of a substance in grams.
Law of conservation of energy In any chemical reaction, energy can neither be created nor destroyed; the energy of the reactants must be equal to the energy of the products..
Law of conservation of mass In any chemical reaction, mass can neither be created nor destroyed; the mass of the reactants must be equal to the mass of the products.
Mole A quantity 6.02 x 10^23 units of a substance; the amount o f a substance equal to the sum of the atomic masses in grams; Avogadro's number.
Molecular formula Formula for a compound which provides the number and identity of the atoms of each element present Ex; C6H1206.
Percent mass Mass of part/mass of whole x 100%.
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 a AC+B.
Species The individual products and reactants in a chemical reaction.
Subscript The integer to the lower right of an element which indicated the number of atoms present in the compound.
Synthesis reaction A chemical reaction in which two or more substances combined to form a compound Ex; A+ B a AB.
Created by: Sillyflamingo
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