Convert 6.42 moles of H2O to molecules

Which of these statements explains the difference between nuclear binding energy and the strong nuclear force ?

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.

If a solution had a ph of 7 what is the solution