x..................x........................x......................x
C6H6 + HO-SO3H ---> C6H5-SO3H + H2O
y...................2y.......................y.......................2y
C6H6 + 2HO-SO3H --> C6H5-(SO3H) + 2H2O
z.....................z
C6H6 ---> C6H6
x=20
y=2.5
x+2y=20+2.5*2=25 moli total
n=m/M==>m=n*M=25*98=2450g H2SO4
Cp=md/ms*100==>ms=md*100/Cp=2450*100/90=2722.22g H2SO4