(1) Calcium carbonate can be widely used as building materials in the construction industry, and can also be used for health care and calcium supplementation. Its chemical formula is CaCO3. ..

(2) Sodium bicarbonate can be used as a medicine to treat hyperacidity in medicine, and it is one of the main components of baking powder in life. Its chemical formula is sodium bicarbonate. ..

(3) Sodium carbonate can be used in glass, paper making, textile printing and dyeing and detergent production, and its chemical formula is Na2CO3. ..

(4) Sodium chloride can be used to prepare physiological saline in medical treatment and seed selection solution in agriculture. Its chemical formula is sodium chloride. ..

So, the answer is: (1) CaCO3; (2) sodium bicarbonate; (3) sodium carbonate; (4) sodium chloride.