How do scientists determine whether a chemical reaction releases or stores energy

The diagram shows the structures of horse and cat forelimbs. what does the diagram suggest about the evolutionary relationship between these two mammals? a. they have homologous structures, indicating a common ancestor. b. they have analogous structures, indicating a common ancestor. c. they have homologous structures, indicating that they do not have a common ancestor. d. they have analogous structures, indicating that they do not have a common ancestor.

If a reactant was removed, did the new equilibrium system shift to make more reactants or more products?

Under normal conditions, describe how increasing the temperatures effects the solubility of a typical salt