In which pair the underlined element in the same oxidation state in both compounds? O A. Cucl, and Naci O B. H2S and SO2 O C. Fe2O3 and FeSO4 OD. MnO2 and MnCl2 An 8 g sample of oxygen contains the same number o atoms as 16 g of element X. What is the relative atomic mass A, of X. O A. 4. OB. 8 O C. 16 O D. 32