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15 Cards in this Set

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[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