Are there any substances that we classify as acids that do not contain any hydrogen atoms? yes or no

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.

C3h8o3 - glycerol major species present when dissolved in water

Which best explains why an iceberg floats?