The two flasks above are connected with stopcock. The flask of H2 has an initial pressure of 1.25 atm, and the initial pressure of the N2 is 0.75 atm. When the stopcock is opened and the gases mix, what is the pressure of the mixture?

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.