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CHEM 113 ACS EXAM - Flashcards

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Class:CHEM 113 - GENERAL CHEMISTRY III
Subject:CHEMISTRY
University:La Sierra University
Term:Spring 2011
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heterogeneous a mixture in which the uneven texture of the material can be detected
homogenous a mixture that consists of two or more substances in the same phase
chemical bonds A chemical bond is an attraction between atoms that allows the formation of chemical substances that contain two or more atoms.
precision indicates how well several determinations of the same quantity agree
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accuracy agreement of a measurement with the accepted value of the quantity.
experimental error Error = experimentally determined value - accepted value
percent error Percent error = error in measurement/accepted value x 100%
isotopes Isotopes are variants of atoms of a particular chemical element, which have differing numbers of neutrons.
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percent abundance Percent abundance = number of atoms of a given isotope/total number of atoms of all isotopes of that element x 100%
atomic weight Atomic weight is a dimensionless physical quantity, the ratio of the average mass of atoms of an element (from a given source) to 1/12 of the mass of an atom of carbon-12 (known as the unified atomic mass unit).
atomic weight eq. Atomic weight = (% abundance isotope 1/100)(mass of isotope 1) + (% abundance isotope 2/100)(mass of isotope 2) + ...
electrostatic forces Coulomb's law or Coulomb's inverse-square law, is a law of physics describing the electrostatic interaction between electrically charged particles.
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 heterogeneousa mixture in which the uneven texture of the material can be detected
 homogenousa mixture that consists of two or more substances in the same phase
 chemical bondsA chemical bond is an attraction between atoms that allows the formation of chemical substances that contain two or more atoms.
 precisionindicates how well several determinations of the same quantity agree
 accuracyagreement of a measurement with the accepted value of the quantity.
 experimental errorError = experimentally determined value - accepted value
 percent errorPercent error = error in measurement/accepted value x 100%
 isotopesIsotopes are variants of atoms of a particular chemical element, which have differing numbers of neutrons.
 percent abundancePercent abundance = number of atoms of a given isotope/total number of atoms of all isotopes of that element x 100%
 atomic weightAtomic weight is a dimensionless physical quantity, the ratio of the average mass of atoms of an element (from a given source) to 1/12 of the mass of an atom of carbon-12 (known as the unified atomic mass unit).
 atomic weight eq.Atomic weight = (% abundance isotope 1/100)(mass of isotope 1) + (% abundance isotope 2/100)(mass of isotope 2) + ...
 electrostatic forcesCoulomb's law or Coulomb's inverse-square law, is a law of physics describing the electrostatic interaction between electrically charged particles.
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