ITS ME ARNOLD I ASSUME THE ANSWER TO THE QUESTION IS CO3
Sodium chloride: NaCl Sodium carbonate: Na2CO3
The formula for germanium carbonate is GeCO3, where Ge represents the element germanium and CO3 represents the carbonate ion.
Sodium: Na or the ion Na+ Carbonate: (CO3)2-
This chemical formula is NaHCO3 - sodium hydrogen carbonate (sodium bicarbonate).
The chemical formula for calcium carbonate is CaCO3, where Ca represents calcium, C represents carbon, and O represents oxygen.
composed mostly of calcite (a crystalline form of calcium carbonate, CaCO3).
The IUPAC name for the compound CaCO3 is calcium carbonate. In this compound, "Ca" represents the element calcium, while "C" represents the element carbon, and "O" represents the element oxygen. The subscript numbers indicate the ratio of each element in the compound, with one calcium atom, one carbon atom, and three oxygen atoms present.
The formulae are respectively Al2(CO3)3, CCl4 and NaCN.
I think your looking for the "Molecular formula" of "Copper Carbonate". It is CuCO3 and Cu(OH)2 in basic form, or Copper Carbonate in Azurite form is Cu3(CO3)2(OH)2
M2CO3 represents a general formula for a carbonate compound where "M" represents a metal cation such as sodium (Na), potassium (K), or calcium (Ca). Examples include Na2CO3 (sodium carbonate) and CaCO3 (calcium carbonate), which are commonly used in various industries, such as in the production of glass, detergents, and cement.
It is Lead Carbonate, but to be more specific, it is Lead (II) Carbonate. Lead can have a charge of +2 or +4. A carbonate ion has a charge or -2. So, in order for the chemical formula to be PbCO3 the lead ion must have a charge of +2, hence the (II) between the lead and carbonate.
calcium cation = Ca2+ carbonate ion = CO32- the charges should cancel and you have the correct formula