Calculate the OH− concentration in each of the following solutions in which the H+ concentrations are
a. 3.5 × 10−8 M
b. 0.0065 M

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.

Electric charge is what ? a. kinetic energy b. radiation c. discovery d. electricity

What reaction is taking place? 02 + c3h8 = h20 + co2