In which of these samples do atoms have the greatest kinetic 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.

Astudent reacts 13 moles of iron with 21 moles of oxygen according to the following equation:

How will the volume of a gas be affected if the pressure is tripled, but the temperature remains the same?