Answer:- [tex]N_2O_3[/tex] has 2 atoms of nitrogen and 3 atoms of oxygen. [tex]CaCO_3[/tex] has 1 atom of calcium, 1 atom of carbon and 3 atoms of oxygen.
Explanations:- The numbers written as subscripts for the elements in formulas of the compounds represents the number of atoms of that particular element.
The first compound is [tex]N_2O_3[/tex] and in this the subscript of N is 2 and that of O is 3. It means it has 2 atoms of N and 3 atoms of O.
Second compound is [tex]CaCO_3[/tex] and in this the subscript of Ca is not shown it means it is 1, similarly the subscript of C is 1 and subscript of O is 3. So, the compound has 1 atom of Ca, 1 atom of C and 3 atoms of O.
