Question

formula de 4-etil-2,3-dimetil-5 propil-nonano

Answer 1

           CH3    CH3   CH2-CH3
 ₁        ₂Ι        ₃Ι        ₄Ι       ₅       ₆         ₇        ₈          ₉
CH3 - CH  -  CH  -  CH - CH - CH2 - CH2 - CH2 - CH3
                                        Ι
                                        CH2-CH2-CH3