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QUESTION

# What is the empirical formula for magnesium sulfate? Thanks!

Empirical formula of a compound is the formula represented by the least ratio of number of atoms of different constituent present in the molecule or the formula unit of the compound.

The molecular formula of benzene is C_6H_6. The least ratio of number of atoms of constituent elements being C:H=1:1. The empirical formula of benzene is CH. So dividing by common factor 6 we get the empirical formula.

If no common factor other than 1 is present among the number of atoms of constituent elements in the formula unit of a compound ,then formula unit itself is its empirical formula . This actually happens in case of Magnesium sulphate having formula unit MgSO_4 .

So empirical formula of Magnesium sulphate is also MgSO_4