150 г                                         Х г

   2C2H6        +       7O2      =      4CO2       + 6H2O

n = 2 моль                                 n = 4 моль

M = 30 г/моль                           M = 44г/моль

m = 60 г                                     m = 88 г

150 г С2Н6   -   Х г СО2

60 г С2Н6     -    88 г СО2

m(CO2) = 150 * 88 / 60 =220 г