1) Which formula represents a mixture? 1Pb(Cl)2(s) 2 C2H5OH(1) 3) NaCl(s) 4) NaCl(aq)

Which of the following is not a characteristic of a hydrogen bond? 1. it is responsible for the unusual physical properties of water. 2. it is weaker than a covalent bond. 3. it is stronger than other dipole-dipole interactions. 4. it can occur when hydrogen is covalently bound to very electronegative elements liks f, cl, br and i.