Topic 3: The Mathematics of Formulas and Equations

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Formula Mass
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The sum of the atomic masses of atoms in the empirical formula of the compound in amu.
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Gram Mass Formula
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Formula mass expressed in grams
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Percent Composition:
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Percentage by mass of each element in a compound. (on reference table)
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Avogadro’s Number
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6.02 * 10^23
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Avogadro’s Hypothesis
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Equal volumes of gasses at the same temperature and pressure contain the same number of molecules regardless of their chemical nature and physical properties -22.4 L of any gas at STP contains one mole of that gas
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Converting from Moles to Grams
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# of Moles * Gram Mass Formula/ 1 mol Mole ratios from a balanced equation will remain the same (On reference table)

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