11. How many moles are of sodium are needed to react completely with 3.1 moles of chlorine in the reaction shown below? 2Nam) + C12(9) + 2 NaCl()
O 1.5 moles Na
O 6.2 moles Na
O 2 moles Na
3.1 moles Na

Scientists discovered fossils in several layers of the earth you see here. they found fossils of algae, snails, and clams in layer d. given that information, where do you think they found fossil evidence of simple land plants and amphibians?