According to henry's law what causes a solute to absorb more gases into solution

According to Henry's law, which was stated in the early 1800's by WIlliam Henry, is that the mass of a solute causes it to absorb more gases into a solution. I hope this helps! ~Mia

Determine the  wavelength of light emitted when an electron  in an li2+ ion  makes a transition from an orbital with n  =  6 to an orbital with n  = 5.