This hollow tube along the back of an animal with nerves running inside or beside it is a characteristic of chordates. 1. nervous system
2. spinal cord
3. spine
4. notochord

A5 mole sample of liquid acetone is converted to a gas at 75.0°c. if 628 j are required to raise the temperature of the liquid to the boiling point, 15.600 kj are required to evaporate the liquid, and 712 j are required to raise the final temperature to 75.0°c, what is the total energy required for the conversion?