Does anyone know what a, b,c or d is

The dissociation energy of a molecule is the energy required tobreak apart the molecule into its separate atoms. the dissociationenergy for a particular molecule is 5.48 x 10-18 j.suppose that this energy is provided by a single photon. determinethe (a) wavelength and (b) frequency of the photon

In the first law of thermodynamics, triangle e=q-w, what does q stand for

Explain what happens at the saturation point when adding salt to water at room temperature.