What mass of benzene is required to obtain 74.4 g of aniline if the mass fraction of the yield of aniline is 64%?

We compose the equation for obtaining aniline from benzene:
C6H6 + NH3 = C6H5NH2 + H2.
1) We calculate the theoretically possible yield of aniline: 74.4 * 100/60 = 124g.
2) Find the molar mass of aniline: 12 * 6 + 1 * 5 + 14 + 1 * 2 = 93.
3) Find the amount of aniline substance. To do this, divide the mass of aniline by its molar mass: 124/93 = 1.3 mol.
According to the reaction equation, the amounts of aniline and benzene substances are 1: 1. This means that the amount of benzene is 1.3 mol.
4) Find the molar mass of benzene: 12 * 6 + 1 * 6 = 78.
5) The mass of benzene is: 78 * 1.3 = 101.4 g – the answer.