The empirical formula of a compound is determined to be ch, and its molecular mass is found to be 78.06 g/mol. determine the molecular formula of the compound, showing your work.

1) Find the mass of the empirical formula:

C: 12.011 g/mol

H: 1.008 g/mol
     
 
Mass of the formula CH =  12.011 g/mol + 1.008 g/mol = 13.019 g/mol

Number of times that the mass of the empirical formula is contained in the molar mass = molar mass / mass of the empirical formula

= 78.06 g/ mol / 13.019 g/mol = 6

=> Molecular formula = C6 H6

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