describe how the HP nitrogen, LP nitrogen, liquid nitrogen ,nitrogen reflux , oxygen rich liquid are produced from the high-pressure lower column

How many atoms are in 1.4 mil of phosphorus trifluoride (pf3)

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.

Determine the reaction and balance the following equations urgent due in the morning