Calculate the approximate diameter of Earth. Use the lowest figure for the thickness of the crust. Show your work.

The excretory system,need answers for all: )

How does the value of the equilibrium constant show that a reaction reaches equilibrium very quickly? (a) the equilibrium constant is large. (b) the equilibrium constant is small. (c) the equilibrium constant is zero. (d) the value of the equilibrium constant does not show how quickly a reaction comes to equilibrium.

Which subshell is represented by the actinides family?