Consider 8 separate systems that each feature a collection of just one molecule type in a condensed state (liquid or solid): System 1: 1 mole of water molecules System 2: 1 mole of hydrogen fluoride molecules (HF) System 3: 1 mole of ammonia molecules (NH3) System 4: 1 mole of molecular hydrogen (H2) System 5: 1 mole of clohexane molecules (C6H12) System 6: 1 mole of methane molecules (CH4) System 7: 1 mole of hydrogen chloride molecules (hydrochloric acid, HCl) System 8: 1 mole of methanol molecules (C3HOH) Which of these systems offer the possibility of hydrogen bonding between the identical molecules of the system? Select all that apply