If i in increase the wavelength of a infrared radiation than it will be

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

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

To find the enthalpy of a reaction in the lab, you measured the of the reactants and the change during the reaction.