Determine the Ka for CH3NH3+ at 25*C. The Kb for CH3NH2 is 4.4 x 10-4.

Energy is released during which phase changes? check all that apply. boiling condensing depositing freezing melting subliming

Which part of earth’s surface receives the most direct rays from the sun? a) equator b) ocean c) poles d) mountains

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.