Lesson 7: Empirical and Molecular Formula

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5 Terms

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Molar Mass (g/mol)

is defined as the mass of a element or molecule per mole of that substance

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Mole

is the “counting unit” used by chemists to indicate the number of atoms, ions, molecules, or formula units present in a particular chemical sample

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Empirical Fomula

represents the simplest whole number ratio of various atoms present in a compound. Tells the ratio of atoms in a molecule

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Molecular Formula

shows the exact number of different types of atoms present in a molecule of a compound. Tells exactly how many atom are in the molecule

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Percent Composition

the percentage by mass of each element in a compound. Represents the mass of each element present in 100.