2. Predict whether an aqueous solution of each of the following salts willbe acidic, (10 %) (NaNO3, NaF, NH4NO3, FeCl3)

9. The energy of molecular orbitals for formaldehyde (H2CO) was listed asfollowing (only valence shell was used): (10 %)E1(-38.12520 eV), E2( -24.22435 eV), E3( -17.14038 eV), E4( -16.39972 eV), E5( -14.32883 eV), E6(-10.63006 eV),E7( 0.82666 eV), E8( 2.70776eV),E9( 4.16055 eV ), E10(6.66917 eV)Calculate the energy difference between HOMO and LUMO forformaldehyde.