Final answer:
Without additional information on other components or total number of moles in the mixture, the composition of a liquid mixture containing 30.0 moles of benzene cannot be accurately defined.
Step-by-step explanation:
The question asks for a calculation regarding a liquid mixture, specifically the composition of a mixture containing 30.0 moles of benzene. To determine the composition of the mixture, the question would typically require information on the total number of moles in the mixture or the other components and their amounts present. However, since the question only provides the amount of benzene and no additional information, a calculation or assumption of composition cannot be accurately made.
Instead, let's consider what additional information might be helpful. If the other substance in the mixture, for instance, toluene, and its mole amount were given, then the mole fraction of benzene could be calculated using the formula:
Mole fraction of benzene = Moles of benzene / (Moles of benzene + Moles of other substance)
However, without more details or context provided in the question, a specific answer regarding the composition of the mixture is not feasible. For a complete analysis, we would need the total volume or mass of the solution, or the details on any other component apart from benzene.