Can anyone with any of these questions : )

If a polyatomic ionic compound has gained two hydrogen ions, then how does its name begin?

How have the greenhouse gasses increased from the year 2000 to 2018

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