Determine the oxidation number of sulfur in each of the
following substances:
Part A barium sulfate, BaSO4 Express your answer as a signed
integer.
Part B sulfurous acid, H2SO3 Express your answer as a
signed integer.
Part C strontium sulfide, SrS Express your answer as a
signed integer.
Part D hydrogen sulfide, H2S Express your answer as a signed
integer.