What is the molecular weight of sulfuric acid?
Molecular weight is such an old-fashioned term nowadays – relative molecular mass would be much better, or you could use molar mass. Details below: The relative molecular mass of sulfuric acid can be calculated by adding the relative atomic masses of the elements in the compound: H2SO4 so (2 x H) + S + (4 x O) (which is 98.078 and is a pure number without units) so Mr(H2SO4) = 98.078 or the molar mass of sulfuric acid is 98.078g/mol so M(H2SO4) = 98.