Problem: How many resonance structures are possible for carbonate, CO32– ?A. 1      B. 2      C. 3      D. 4      E. 0

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We are being asked to identify the number of resonance structures for CO32-. We have to follow the 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 for formal charges, determine the number of possible structures :

First, we will have to draw the Lewis Structure of CO32

Step 1: Determine the central atom in this molecule.

C → less electronegative atom than O → central atom

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Problem Details

How many resonance structures are possible for carbonate, CO32– ?

A. 1      B. 2      C. 3      D. 4      E. 0