(a) Select all of the correct statements about the relative acid strengths of pairs of acids from the choices below. HCl is a stronger acid than H2S because Cl is more electronegative than S. H3PO3 is a stronger acid than H3PO4 because it has fewer oxygens surrounding the central P atom. H2C2O4 is a stronger acid than HC2O4- because it has more acidic hydrogens. HI is a stronger acid than HCl because I atoms are larger than Cl atoms. H3AsO4 is a stronger acid than HAsO42- because it has more acidic H atoms. AsH3 is a stronger acid than HBr because As is larger than Br.