Find Empirical mass.
[tex]\\ \bullet\sf\longmapsto C_2H_3O_2[/tex]
[tex]\\ \bullet\sf\longmapsto 2(12u)+3(1u)+2(16u)[/tex]
[tex]\\ \bullet\sf\longmapsto 24u+3u+32u[/tex]
[tex]\\ \bullet\sf\longmapsto 59g/mol[/tex]
Now Divide it by Molecular Mass..
[tex]\\ \bullet\sf\longmapsto \dfrac{118}{59}[/tex]
[tex]\\ \bullet\sf\longmapsto 2[/tex]
Now molecular formula
[tex]\\ \bullet\sf\longmapsto 2(C_2H_3O_2)[/tex]
[tex]\\ \bullet\sf\longmapsto C_4H_6O_4[/tex]
