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Final - ch3
chapter. 3
11
Chemistry
Undergraduate 1
12/12/2009

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Term
Chemical Coumpounds
Definition
involve atoms of two or more elements, chemically combined, with the atoms in fixed whole number ratios. In general, they can be molecular or ionic
Term
some compounds form solids called...
Definition
hydrates, which contain water molecules in definite proportions
Term
Molecular formula
Definition
Contains the type and number of atoms in each molecule of a molecular compound.
Term
binary ionic compounds
Definition
are formed bw a metal and a non-metal
Term
the metal ion becomes a ___________ and the non-metal an ____________
Definition
cation (+), anion (-)
Term
the formula of such a compoound fives the smallest whole # ratio of the ions and is called _________
Definition
formula unit
Term
MOLECULAR and FORMULA MASSES
Definition
of molecular and ionic compounds, respectively, refers to the mass in atomic mass units (u) of all atoms in a chemical formula.
Term
mass percent
Definition
(mass of element/total mass of compound) x 100%
Term
empirical formula
Definition
of an unknown compound gives the simplest ratio of atoms of each element in a molecular compound, and can be determined from its experimentally determined mass percent composition
Term
the molecular formula of the compound can be determined from the ___________ when the molar mass of the compound is known
Definition
empirical formula
Term
Molecular formula molar mass =
Definition
empirical formula molar mass x 'integral factor
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