3.2 Determining Empirical and Molecular Formulas.docx -...

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Alloy NodicaCICT-1253.2 Determining Empirical and Molecular FormulasThe relationship between a substance's bulk mass and the number of atoms or molecules itcontains was covered in the previous section (moles). Due to the chemical formula, we were able toconvert the mass of the substance to its moles and the other way around. But what if you don't know asubstance's chemical formula? Our focus in this section is on applying the same approaches fordetermining unknown material chemical formulae from experimental mass measurements.Percent CompositionChemical identity is defined by a compound's elemental composition, and chemical formulas arethe best way to express this composition in words. When the formula of a compound is unknown, thefirst step in experimentally finding the formula is to measure the mass of each of its constituentelements. Because of this, the percent composition of a compound can be calculated as the mass
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Term
Fall
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Atom, Ion, Molecular Formulas

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