150 г                                           Х л

  H2SO4       +        Na2CO3      =     Na2SO4      +   CO2   +    H2O

                            n = 1 моль                                    n = 1 моль

                     Mr = 106 г/моль                                  Vm=22,4 л/моль

                     m = 106 г                                             V = 22,4 л

150 г Na2CO3     -     Х л СО2

106 г Na2CO3     -    22,4 л СО2

V(CO2) = 150 * 22,4 \ 106 = 32 л