How much of strontium-90 will be left after 40 hours if you start with 960 grams and the half-life is 10 hours?

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.

12. calculate the hydroxide ion concentration of a solution with ph = 3.25. show all calculations leading to an answer

Draw the lewis dot structure for each of the following polyatomic ions