Which of these statements is MOST accurate about the Sun? A:It has an infinite energy supply.
B:It has consumed approximately one-half of its expendable energy.
C:It is in its infancy in terms of energy consumption
D:It is near the end of its life cycle.

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.