Chapter 8, Problem 104QP

Oxalic acid, ${\text{H}}_{\text{2}}{\text{C}}_{\text{2}}{\text{O}}_{\text{4}}\text{,}$ a poisonous colorless solid, is found in some vegetable such as spinach and rhubarb. It is present in concentration well below the toxic limit, so you can’t use this as a reason to refuse a helping of spinach. The order of atoms in a molecular of oxalic is ${\text{HO}}_{\text{2}}{\text{CCO}}_{\text{2}}\text{H}\text{.}$ How many unshared pairs of electron are on the carbon and oxygen atoms?