BRAINCAKEExample Question - 2
The empirical formula can be calculated using chemical analysis to determine the mass of each element in a compound or the percentage composition by mass of each element in a compound. This can be used to find the number or relative number of moles of each element by dividing the mass or percentage mass by the relative atomic mass. This can then be converted into a whole number ratio in its simplest terms.
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Key terms in this lesson
- Relative atomic mass
- The weighted mean mass of an atom of an element compared to 1/12th the mass of a carbon-12 atom.
- Mole
- The amount of substance that contains as many particles as there are atoms in exactly 12g of carbon-12.
- Empirical formula
- The simplest whole number ratio of atoms of each element in a compound.
More in Amount of Substance
- Example Question - 1
- Example Question - 2
- Empirical Formula
- Example Question - 1
- Molecular Formula
- Combustion Analysis
- Example Question - 1
- Example Question - 2
All 33 lessons in Amount of Substance · All AQA AS-level Chemistry topics