We are asked to calculate for the **percent by mass (mass %) of each e****lement** in **benzene** **(C _{6}H_{6})** and to do that we’re going to use the

$\overline{){\mathbf{\%}}{\mathbf{Mass}}{\mathbf{}}{\mathbf{=}}{\mathbf{}}\frac{\mathbf{mass}\mathbf{}\mathbf{of}\mathbf{}\mathbf{element}}{\mathbf{total}\mathbf{}\mathbf{mass}}{\mathbf{\times}}{\mathbf{100}}}$

First, we need to get the atomic weights of each element in** benzene** using the periodic table and then calculate its molar mass.

**Mass of ****C****:**

6 x 12.01 g/mol C = **72.06**** g ****C**

Calculating the mass percentages of the elements in benzene after calculating the molecular weight of benzene.

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