Final answer:
The balanced symbol equation for the cracking of dodecane into octane and ethane is C₁₂H₂₆ → C₈H₁₈ + C₂H₆.
Step-by-step explanation:
The balanced symbol equation for the cracking of dodecane into octane and ethane is:
C₁₂H₂₆ → C₈H₁₈ + C₂H₆