Problem: Use formal charge to choose the best Lewis structure for CH3SO2CH3.

We’re being asked to determine the preferred structure for CH₃SO₂CH₃. 

For this problem, we need to compare the formal charge of each structure. 

Recall that the formula for the formal charge is:

$\boxed{\mathbf{F}\mathbf{.}\mathbf{C}\mathbf{.}\mathbf{=}\mathbf{Group}\mathbf{ }\mathbf{Number}\mathbf{-}\mathbf{(}\mathbf{Bonds}\mathbf{+}\mathbf{Nonbonding}\mathbf{ }{\mathbf{e}}^{\mathbf{-}}\mathbf{)}}$

Structure 1: The given Lewis structure is:

Calculating for the formal charge of each atom: