What's the pH of a solution of ammonia that has a concentration of 0.335 M? The Kb of ammonia is 1.8×10^-5 please show work​

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.

Apound is approximately 0.45 kilogram. a persons weighs 87 kilograms. what is the persons’s weight, in pounds, when expressed to the correct number of significant figures

Amatch has about 21 milligrams of red phosphorus coating the tip. how many atoms of phosphorus is this?