Density of H2SO4 = 1.84g/mL
Molecular weight of H2SO4 is 98.079
96 ml H2SO4 equals 96 x 1.84 = 176.64 g
Hence, 100 ml H2SO4 volume contains 176.64 g H2SO4. So 1 liter volume of H2SO4 contains 1776.4 g.
Hence, the molarity of 96% H2SO4 is 1776.4/98.079 = 18.11 M