What killed the great beasts of North America

What volume of a 0.25 m solution can be made using 0.55 moles of ca(oh)2

The chemical form of energy that is useable by the cell to do work

Which best describes the scientific method? a. a path of clearly defined steps that must be followed in a particular order b. a possible answer to a scientific question based on knowledge or research c. the recipe for how to conduct an experiment that must be followed precisely d. the process of hypothesis and testing through which scientific inquiry occurs