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Unit 6: The Mole

Chemistry

TermDefinition
Avogadro's Number The number of atoms, molecules, or particles in a mole.
Molar Mass The mass of one mole of a pure substance, the mass in grams of 1 mol of a substance, molar mass is usually written in "g/mol"
Mole A mole (abbreviated mol) is the amount of substance that has as many particles as there are atoms in exactly 12 g of carbon-12.
Molecule A molecule is a neutral group of atoms that are held together by covalent bonds.
Scientific Notation Numbers are written in the form M x 10(n) ; the factor M is a # greater than or equal to 1 but less than 10, & N is a whole #.
Formula Unit Simplest collection of atoms from which an ionic compound's formula can be written.
Molecular Mass The sum of atomic masses of all atoms in a molecule.
Atomic Mass It is a weighted value and average of the atomic masses of the naturally occurring isotopes of an element.
Molecular Formula A chemical formula that shows the number and kinds of atoms in a molecule but not the arrangement of the atoms.
Density Density is the ratio of mass to volume, or mass divided by volume.
Formula Mass The sum of the average atomic masses of a compound's elements.
Percent Composition Percentage composition is the number of grams in one mole of a compound.
Empirical Formula Consists of the symbols for the elements combined in a compound, with subscripts showing the smallest whole number ratio of the different atoms in a compound. Shows the whole-number ratio of elements in a compound.
Created by: mv383931
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