To calculate the empirical formula, start by calculating the moles using the molar masses of the elements.
Empirical formula calculation begins by calculating the number of moles of each element present in the compound. This is done by dividing the mass of each element by its respective molar mass (which is equal to the relative atomic mass).
The numbers of moles are then divided by the smallest of the obtained values, to calculate the molar ratio of the elements. If necessary, these numbers are then multiplied so that they are all integers. These integers are the indexes in the empirical formula of the compound.
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