Question

determine the empirical formula of a compound having percentage composition as:

iron=20% , sulphur=11.5% , oxygen= 23.1% , and water molecules= 45.4%

(Atomic mass of Fe=56, S=32 )​

Answer 1

$\huge\underline\mathcal\purple{Answer}$

$\ FeSO_4 . 7H_2O$