What is it called when you have hydrogen peroxide that just eventually turns into water

Skills of homo sapiens were found an excavation. the skulls were preserved because the bodies were frozen. so, these fossils are (blank) fossils.the image shows the evolution of skulls beginning 2 to 3 million years ago. based on the image, modern human skulls(blank) ape skulls.

Define the kinetic molecular theory

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