Write the formula for the compound formed when the given polyatomic anion combines with a cation from the given element. Hydrogen sulfite (HSO3) and barium, Hydrogen carbonate (HCO3) and sodium, Hydroxide (OH) and aluminum

The formula for the compound formed when the polyatomic anion hydrogen sulfite (HSO3) combines with the cation barium (Ba) is:

Ba(HSO3)2

The formula for the compound formed when the polyatomic anion hydrogen carbonate (HCO3) combines with the cation sodium (Na) is:

NaHCO3

The formula for the compound formed when the polyatomic anion hydroxide (OH) combines with the cation aluminum (Al) is:

Al(OH)3