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six moles of toluene are combined with two moles of benzene. what is th…

Question

six moles of toluene are combined with two moles of benzene. what is the mole fraction of benzene in the solution? (use two significant figures.)

  1. 1.2
  2. 0.33
  3. none of these
  4. 0.25
  5. 0.50

Explanation:

Step1: Calcular el total de moles

La cantidad de moles de tolueno es 6 y la de benceno es 2. Entonces, el total de moles ($n_{total}$) es la suma de ambos: $n_{total}=n_{toluene}+n_{benzene}=6 + 2=8$ moles.

Step2: Calcular la fracción molar de benceno

La fórmula para la fracción molar ($X$) de un componente es $X_{componente}=\frac{n_{componente}}{n_{total}}$. Para el benceno, $n_{benzene}=2$ y $n_{total}=8$. Entonces, $X_{benzene}=\frac{2}{8}=0.25$.

Answer:

  1. 0.25