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sales tax

(Encyclopedia) sales tax, levy on the sale of goods or services, generally calculated as a percentage of the selling price, and sometimes called a purchase tax. It is usually collected in the form of…

Chemistry: Properties of Acids and Bases

Properties of Acids and BasesChemistryAcids and BasesWhat Are Acids and Bases?Properties of Acids and BasesThe pH ScaleTitrationsBuffers It's frequently possible to tell acids and bases apart from…

Chemistry: Properties of Covalent Compounds

Properties of Covalent CompoundsChemistryGetting to Know Covalent CompoundsWhat Are Covalent Compounds?Formation of Multiple Covalent BondsProperties of Covalent CompoundsWhat's in a Name? Covalent…

Chemistry: Properties of Ionic Compounds

Properties of Ionic CompoundsChemistryIonic CompoundsWhat's an Ionic Compound?How Ionic Compounds Are FormedProperties of Ionic CompoundsWhat's in a Name? Ionic Nomenclature Because all ionic…

Geometry: Properties of All Quadrilaterals

Properties of All QuadrilateralsGeometryPutting Quadrilaterals in the ForefrontProperties of All QuadrilateralsProperties of TrapezoidsLet's All Fly a Kite!Properties of ParallelogramsThe Most…

Geometry: Properties of Similar Triangles

Properties of Similar TrianglesGeometrySimilar TrianglesRatio, Proportion, and Geometric MeansProperties of Similar TrianglesThe Big Three When we talk about two things being similar, we are…

excess profits tax

(Encyclopedia) excess profits tax, levy on any profit above a standard level. Chiefly a wartime phenomenon, it is intended to increase revenue during periods of distress and to prevent businessmen…