Solution:
Step 1: Represent a molecular formula.
[tex]\text{molecular formula} = (\text{C}\text{H}_{4}\text{N})_{n}[/tex]
Step 2: Calculate the empirical mass.
empirical mass = (12.01 g/mol × 1) + (1.008 g/mol × 4) + (14.01 g/mol × 1)
empirical mass = 30.05 g/mol
Step 3: Divide the molecular mass by the empirical mass.
[tex]n = \frac{\text{molecular mass}}{\text{empirical mass}}[/tex]
[tex]n = \frac{\text{60.0 g/mol}}{\text{30.05 g/mol}}[/tex]
[tex]n = 2[/tex]
Step 4: Multiply the subscripts by the value of n to obtain the molecular formula.
[tex]\text{molecular formula} = (\text{C}\text{H}_{4}\text{N})_{2}[/tex]
[tex]\boxed{\text{molecular formula} = \text{C}_{2}\text{H}_{8}\text{N}_{2}}[/tex]
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