PCAT Compounds and Stoichiometry Flash Cards

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Title: PCAT Compounds and Stoichiometry
Description: quick review of compounds and stoichiometry straight out of the PCAT review book
Number of Cards: 15
Save Count: 0
Author: yesi09
Created: 2010-03-04
Tags: and compounds pcat stoichiometry
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    • Question
    • Answer
    • Side 3
    • [GEM]
      Gram Equivalent Weight
    • GEM = Molar Mass / n

      n = # of hydrogens or hydroxl groups per molecule
    • Percent Composition
    • % Comp =
      Mass of X in Formula / Formula Weight of Compound
      x 100%
    • Percent Yield
    • Percent Yield =
      actual yield / theoretical yield
      x 100%
    • Mole
    • Mole =
      weight of sample (g) / Molar Weight (g/mol)
    • Avogadro's Number
    • 6.022E23
    • Molecular Weight
    • sum of the atomic weights (in amu) of atoms in a molecule
    • Empirical Formula
    • gives the SIMPLEST whole number ratio of elements in a compound
    • Molecular Formula
    • gives the EXACT number of atoms of each element in the compound
    • Combination Reaction
    • reaction in which two or more reactants form one product
    • Decomposition Reaction
    • reaction in which a compound breaks down into two or more substances
    • Single Displacement Reaction
    • reaction that occurs when an atom of one compound is replaced by an atom of another element
    • Double Displacement Reaction
    • reaction in which elements from two different compounds displace each other to form two new compounds
    • compound
    • pure substance that is composed of two or more elements in a fixed proportion
    • molecule
    • combination of two or more atoms held together by covalent bonds
    • Equivalents
    • equivalents =
      weight of compound / gram equivalent weight