Balance the equation Mg +H2o +O2 =HNO3​

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.

When a spring is compressed, the energy changes from kinetic to potential. which best describes what is causing this change?

What is the empirical formula of c6h18o3? ch3o c2h5o c2h6o c2h5o5