Use the polyatomic ions listed below and a periodic table to…

Use the polyatomic ions listed below and a periodic table to write formulas for the following compounds.                 Sulfate (SO4)-2        Phosphate  (PO4)-3      Nitrate  (NO3)-1       Hydroxide  (OH)-1        Carbonate (CO3)-2 Ammonium (NH4)+1 Please number your answers.  Use the subscript key ( ) in the the toolbar to write the formulas.  1.  potassium carbonate                         2.  magnesium hydroxide 3.  nitrogen trioxide 4.  chromium (III) oxide