I need help with completing an equation. It is a skeletal formula that includes HOOC, HO, Cl and then MgO is added to it. I am not sure how to even begin this equation but it is unlike the previous balancing that we have done.

Try writing the formula out as a line formula;i.e., ClCH2CH3COOH

Write, the skeletal structure for that exists in the question (a sort of hexagonal structure with different lines within to indicate it) but I am not sure what it wants when MgO is added to it on the other side of the "-->"

OK. You have a benzene ring. If it has only one attachment, it is C6H5 then you add the attachment. If it has the OH AND COOH attached to the right it is C6H4(Cl)COOH, etc. For example, C6H5COOH is benzoic acid.

To begin balancing this equation, let's first identify the elements present in the skeletal formula. From your description, we can see the following elements: H, O, C, Cl, and Mg.

Next, let's determine the number of each element present on both sides of the equation.

On the left side of the equation, we have:
- 1 carbon atom (C)
- 3 oxygen atoms (O)
- 2 hydrogen atoms (H)
- 1 chlorine atom (Cl)
- 1 magnesium oxide group (MgO)

On the right side of the equation, we have an unknown number of carbon, oxygen, hydrogen, and chlorine atoms, as well as an unknown number of magnesium oxide groups.

Since we need to balance the equation, we must ensure that the number of each element is the same on both sides.

Here is one possible balanced equation, assuming all reactants convert to products:

C + 2O + HCl + MgO → CH3O2Cl + MgO + H2O

In this equation, the carbon, oxygen, hydrogen, and chlorine atoms are now balanced on both sides. However, it appears that the magnesium oxide group (MgO) is not participating in the reaction, as it remains unchanged on both sides of the equation.

Therefore, it is necessary to have more information about the reaction or the compounds involved to provide a fully balanced equation.