Respuesta :
Calcium Carbonate is used to make chalk drawing
Number of atoms of elements are given in the question when we combine such atoms, a result product will be calcium carbonate. A molecule which has one atom of calcium ( Ca ), one atom of carbon ( C ) and three atoms of oxygen ( O ). By combining these, CaCO3 will be formed which is the chemical formula of calcium carbonate.
Ca + C + O3 ---->CaCO3.