Describe characteristics of reversible reactions and explain what it means for a reaction to be in equilibrium

Which statements describe polyatomic ions? check all that apply. polyatomic ions have many charges. polyatomic ions have one overall charge. polyatomic ions repel other ions to form ionic bonds. polyatomic ions attract other ions to form ionic bonds. polyatomic ions are made up of only one type of atom. polyatomic ions are made up of two or more types of atoms.

Can someone me with questions 15 to 17 plz.

What is a metal replacement reaction