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Unit 6: The Mole

The Mole

TermDefinition
Avogadro's number ( 6.022 141 79 X 10^23) : It is the number of particles in exactly one mole of a pure substances.
Molar mass The mass of one mole of a pure substance.
Mole ( Mol) It is the amount of a substance that contains as many there are atoms in exactly 12 g of carbon-12
Molecule It is neutral group of atoms that are held together by covalent bonds.
Scientific notation They are numbers written in the form M x 10^n, where the factor M is the number greater than or equal to 1 but less that 10, and n is a whole number.
Formula unit It is the simplest collection of atoms from which an ionic compound's formula can be written.
Molecular mass It is calculated by adding the masses of the element present in a mole of the molecule or a formula unit that makes up the compound.
Atomic mass It is the weighted average of the atomic masses of the naturally occurring isotopes of an element.
Molecular formula It is the actual formula of a molecular compound.
Density The ratio of mass to volume or, the mass divided by volume
Formula mass It is the mass of any molecule, formula unit, or iron is the sum of the average atomic masses of all atoms represented in its formula
Percent composition The percentage by mass of each element in a compound
Empirical formula It consists of the symbols for the element combined in a a compound, with subscripts showing the smallest whole number mole ratio of the different atoms in the compound
Created by: ll458868
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