We’re being asked to determine the **Lewis structures and assign a formal charge to each atom of CH _{3}CN**.

**To do so, we need to do the following steps:**

*Step 1:* Determine the central atom in this molecule.

*Step 2:* Calculate the total number of valence electrons present.

*Step 3:* Draw the Lewis structure for the molecule.

*Step 4:* Calculate the formal charge for the indicated atom.

Recall that the formula for the **formal charge is:**

$\overline{){\mathbf{FC}}{\mathbf{}}{\mathbf{=}}{\mathbf{}}{\mathbf{Group}}{\mathbf{}}{\mathbf{\#}}{\mathbf{}}{\mathbf{-}}{\mathbf{}}{\mathbf{(}}{\mathbf{Bonds}}{\mathbf{}}{\mathbf{+}}{\mathbf{}}{\mathbf{nonbonding}}{\mathbf{}}{{\mathbf{e}}}^{{\mathbf{-}}}{\mathbf{)}}}$

Write the correct Lewis structures and assign a formal charge to each atom.

(c) CH_{3}CN

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Our tutors have indicated that to solve this problem you will need to apply the Lewis Dot Structure: Formal Charge concept. If you need more Lewis Dot Structure: Formal Charge practice, you can also practice Lewis Dot Structure: Formal Charge practice problems.