Percent =mass of the elementx100molar mass of compound Find the mass percents for the elements present in H2SO4.molar mass of H2SO4 = 2(1) + 32 + 4(16) = 98 gmass of H = 2 mol H x 1.008g/mol = 2.016 gmass of S = 1 mol S x 32.00g /mol = 32.00 gmass of O = 4 mol O x 16.00g/mol = 64.00 gmass % H = 2.016g/98g x 100 = 2.06%mass % S = 32.00g/98g x 100 = 32.6%mass % O = 64.00g/98g x 100 = 65.3% Calculate the mass % of the elements present in glucose, C6H12O6.