NO ROMAN NUMERALS IN THE NAME: Na and O, Mg and PO4, K and SO4, Sr and I, Zn and Br, Li and NO3, Ca and F, Ag and Se, Cd and ClO4, Al and Cl, USE ROMAN NUMERALS IN THE NAME: Cr and S, Fe and O, Ni and OH, Pb and HClO3, Au and CrO4, Cu and Br, Mn and Se, Pt and P, Co and Cl, Zr and N,

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