30.6 • 150 is the same as 4,500 + 90, or 4,590 million kilometers, oddly enough, this isn't one of the options for an answer. Perhaps there was a typo?
They lose water by evaporation on their skin and respiratory surfaces
It is an glycosidic bond.
The bond energy is defined as equal to the amount of energy given out when the bond is made (or absorbed when that the bond is broken).
So when a bond is made, and the system cools to its original energy, the amount of energy given out, -DeltaH, is more or less equal to the bond energy.
Noticed that minus sign. For a process that releases heat, DeltaH is negative.
Internet to the rescue
Hope this helps!
A solute is a substance that is dissolved in the solvent.
Some examples of a solute are sugar in water, carbon dioxide in water, and sodium chloride in water.
