M,anilina= 93g/mol= 93kg/kmol
n= m/M=279kg/93kg/kmol= 3kmol
C6H5NH2+ H2SO4---> H2N-C6H4-SO3H
3kmol anilina reactioneaza cu 3kmol acid...cu m=3x98kg= 294kg
avand in vedere excesul de 10% acid--> m,acid= 294+ 10x294/100-> 323,4kg
c= mdx100/ms--> ms= 323,4x100/90=..................calculeaza !!!!
