kuyhongtaing kuyhongtaing 24-03-2021 Chemistry contestada Which one are only compounds? * a. Steam (H2O), blood, mercury (Hg) b. Iron (II) sulfide (FeS), Calcium oxide (CaO), Salt (NaCl) c. Steel, milk, Chlorine gas (Cl2) d. Gold (Au), bromine gas (Br2), Iodine gas (I2)