The empirical formula is: A. the actual number of atoms of each element in a molecule.
B. representation of a compound that shows how its atoms are arranged.
C. All of these
D. the relative number of atoms of each element, using the lowest whole ratio.
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option c the relative number of atoms of each element using the lowest ratio because empirical formula gives the simplest-whole number ration of each element

e.g. the empirical formula of benzeneC6H6 in CH

Explanation:

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sulfur belongs to group 16 because it can be found in nature whether it is in a free or combined state.

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the electrical  conductivity  of asolution  of an electrolyte is measured by determining the resistance of thesolution  between two flat or cylindrical electrodes separated by a fixed distance.