What is the molar mass of Mg?

Which question could be best answered using the process of scientific inquiry? do different plates have different rock compositions? why did it take so long to develop the theory of plate tectonics? what are different cultural myths caused by plate tectonics? do plates move intentionally to cause volcanic eruptions?

The mass of a proton is approximately equal to the mass of

Which part of the mantle is similar to the crust ? (science)