5. how are the empirical and molecular formulas for a compound related?
a an empirical formula is sometimes a multiple of the molecular
formula.
ob a molecular formula is always the same as an empirical formula.
c an empirical formula is always larger than the molecular formula.
d a molecular formula is sometimes a multiple of the empirical formula.

The empirical and molecular formulas for a compound related in a way that, A molecular formula is sometimes a multiple of the empirical formula.

Explanation:

The measure of the number of atoms of each element that are present in a compound is the Molecular formula. The empirical formula gives the ratio of elements that are present in a compound in reduced way. It the molecular formula of a particular compound is not in a state of being reduced further then, the empirical and the molecular formula appears to be same.

The chemical can be attained from the empirical formula of any compound. This can be achieved by knowing the molecular weight of any compound.   The chemical formula for a compound obtained by composition analysis is always the empirical formula. Thus, the molecular formula is integer multiples of the subscripts of the empirical formula.

d

explanation: