How does a balanced equation satisfy the Law of Conservation of Mass

How would you reduce the volume of gas

In 2002, the rare earth elements mine in mountain pass, california was closed because

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