The chemical formula for zinc oxalate is "ZnC2O4." "Zn" is the chemical symbol for zinc, "C" is the chemical symbol for carbon and "O" is the chemical symbol for oxygen. The overall oxalate ion is represented by the chemical formula "C2O4."
The chemical formula for a compound can be determined by finding the chemical symbols for each component on the periodic table of elements. The formal charge of a molecular formula should be zero, so the number of each atom within each ion in the formula must balance out both negative and positive charges. There is one atom of zinc in zinc oxalate.