Which of the following combinations cannot produce a buffer solution? Select all that apply. NH3 and (NH4)2SO4HNO2 and KNO2HOCl and NaClH2SO4 and Na2SO4HClO4 and NaClO4HF and NaFHCN and LiCNNH4Cl and NaOH

Determine the wavelength of the light absorbed when an electron in a hydrogen atom makes a transition from an orbital in the n=3 level to an orbital in the n=7 level.

An atom of lithium (li) and an atom of chlorine (cl) engage in a chemical reaction. which correctly describes the structure of the resulting chemical compound? hint: consider the class of each element. the chemical compound will have a network structure. the chemical compound will have triple bonds. the chemical compound will have a ball-and-stick structure. the chemical compound will have double bonds.

If anyone would be able to me out with these three questions it would be these are from the chem 2202 course.