Molecular mass

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3.3: Formula Masses - Chemistry LibreTexts Empirical Formula, Atomic Mass Unit, Structural Formula, Molecular Mass, Ionic Compound, Ammonium Nitrate, Molar Mass, Hydrogen Atom, Molecular Structure

The empirical formula of a substance can be calculated from its percent composition, and the molecular formula can be determined from the empirical formula and the compound’s molar mass. The empirical formula of a substance can be calculated from the experimentally determined percent composition, the percentage of each element present in a pure substance by mass. In many cases, these percentages can be determined by combustion analysis.

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