What is the mass of 9.38*10^24 molecules of methanol?

The excretory system,need answers for all: )

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?

The independent variable in an experiment will be the variable that you o a) change ob) hold constant ng c) observe for changes