CaCO3 + 2HCl = ?

CaCO₃ is a carbonate and HCl is an acid, so the products will be a salt, water and Carbon Dioxide.Removing 2 Hydrogen atoms and an Oxygen atom for the H₂O, and one carbon atom and 2 Oxygen atoms for the Carbon Dioxide for the CO₂ leaves us with one Ca atom and 2 Cl atoms.Therefore the salt is CaCl₂The answer is CaCl₂ + H₂O + CO₂