We are asked to calculate for the percent by mass (mass %) of each element in benzene (C6H6) and to do that we’re going to use the mass percent formula shown below:
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.