Given the gc data below calculate the standard gibb’s free energy change involved in the mobile phase-stationary phase transition. kc = k′β where β=200 δg°= –rt ln(kc) temperature (°c) standard compound retention time (min) test compound retention time (min) 115 1.375 1.830 100 1.385 1.975

the answer for apex is the lowest

you'd use the equation that establishes a relationship between  energy  and  wavelength, which looks like this

e=h⋅cλ, where

λ  - the wavelength of the photon; c  - the speed of light, usually given as  3⋅108m/s; h  -  planck's constant, equal to  6.626⋅10−34j s

plug the value you were given for the energy of the photon in the above equation to get the wavelength

e=h⋅cλ⇒λ=h⋅ce

λ=6.626⋅10−34js⋅3⋅108ms−1.257⋅10−24j=1.581⋅10−1m