Find the number of moles in 3.70*10^-1 g of boron

i know boron is 10.811 and what do i do after?

This drawing shows a human body system. what is the primary function of this body system?

How can one make a supersaturated solution? (apex)

The bond energy for the van der waals bond between two helium atoms is 7.9×10−4ev. assuming that the average kinetic energy of a helium atom is (3/2)kbt, at what temperature is the average kinetic energy equal to the bond energy between two helium atoms