The molecular weight of H 2 SO 4 is:

49.078 g/mole
98.086 g/mole
194.296 g/mole

the molecular weight of H2SO4 is 98.086g/mole

the number of valence electrons for each molecule or ion is shown beneath the structure. remember hydrogen will not have more than two electrons. this hydrogen is part of a covalent bond (sharing two electrons). a double bond here would cause hydrogen to share four electrons with phosphorus.