What volume of hydrogen is needed to react completely with 26 l of nitrogen?

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.

What are the chemical names of these compounds? ke: mg3n2: reset next

What type of matter is made of only one kind of atom