Ответ:

n(CO2)=94,08:22,4=4,2моль; n(H2O)=86,4:18=4,8моль;

             

                                                       4,2      4,8

                                     CxHy+O2= CO2 + H2O

                                                        7        8      

                                     CxHy+O2=CO2 + H2O

                                      CxHy+O2=7CO2+8H2O

                                            x=7; y=16.

ответ:С7Н16.