A portion of CaCO3 marble is dissolved in a solution of HCl with a molar concentration of 0.04 mol/l. With complete dissolution of the sample, 0.3 l of carbon dioxide, measured at a temperature of 27*C and a pressure of 83.1 kPa, was released. Write the reaction equation. Calculate how many moles of carbon dioxide are released, how many liters of acid are taken for the reaction, which is the final molar concentration of the salt