Calculate the ph of a solution having [OH-] = 8.2 x 10 ^-8M

Which metal exist in liquid state and can be cut with knife ?

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.

Acontrol during an experiment. might change remains constant does not exist does change