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Chapter 6: Chemical Composition
N/A
8
Chemistry
11th Grade
01/27/2013

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Term
Atomic Mass Unit
Definition
The weighted average mass of the atoms in a naturally occurring element.
Term
Average Atomic Mass
Definition
Each element contains an amu listed on the Periodic Table.
Term
Mole
Definition
The number equal to the number of carbon atoms in exactly 12 grams of pure 12C, Avogadro's Number.  One mole represents 6.022 X 1023 units.
Term
Avogadro's Number
Definition
The number of atoms in exactly 12 grams of pure 12C, equal to 6.022 X 1023.
Term
Molar Mass
Definition
The mass in grams of one mole of a compound.
Term
Mass Percent
Definition
The percent by mass of a component of a mixture or a given element in a compound.
Term
Empirical Formula
Definition
The simples whole-number ratio of atoms in a compound.
Term
Molecular Formula
Definition
The exact formula of a molecule, giving the types of atoms & the number of each type.
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