How this relationship is explained in Darwin's Theory of Evolution?

12. calculate the hydroxide ion concentration of a solution with ph = 3.25. show all calculations leading to an answer

Consider a culture medium on which only gram-positive organisms such as staphylococcus aureus colonies can grow due to an elevated nacl level. a yellow halo surrounds the growth, indicating the bacterium fermented a sugar in the medium, decreasing the ph as a result and changing the color of a ph indicator chemical. this type of medium would be referred to as a differential and enrichment culture.

What is the value of the standard enthalpy of formation of an element in its most stable form?