A substance has an empirical formula of N2O5 . If the molar mass of the molecular formula is 216 g/mol, find the molecular formula of the substance ?

If this equation was completed which statement would it best support

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

How does kepler second law of planetary motion overthrow one of the basic beliefs of classical astronomy