ch8

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atomic mass unit (amu)

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A unit of mass used to express atomic and molecular weights, equivalent to one twelfth of the mass of an atom of carbon-12.

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average atomic mass

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The weighted average of the atomic masses of the naturally occurring isotopes of an element.

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mole

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A unit of measurement for amount of substance in the International System of Units (SI). It contains exactly 6.02214076×10²³ elementary entities (atoms, molecules, ions, or other particles).

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Avogadro's number

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The number of constituent particles (usually atoms or molecules) that are contained in one mole, which is approximately 6.022×10²³.

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conceptual problem solving

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An approach to problem solving that involves understanding the underlying concepts and principles before applying formulas or algorithms.

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molar mass

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The mass of a given substance (chemical element or chemical compound) divided by the amount of substance, measured in g/mol.

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mass percent

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A way of expressing a concentration or a way of describing a component in a mixture. It is the mass of a component divided by the total mass of the mixture, multiplied by 100%.

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empirical formula

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The simplest positive integer ratio of atoms present in a compound.

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molecular formula

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A formula giving the number of atoms of each of the elements present in one molecule of a specific compound.