See the answer below.
Work Step by Step
a) Valence electrons C: 4, H: 1, O: 6, N:5 Bicarbonate: $3×6+1+4+1=24$ Nitric acid: $1+5+3×6=24$ They are isoelectronic. b) Two ressonance structures each, alternating the O= with the O- group. c) The nitrogen in nitric acid has a formal charge of +1, the oxygen making a single bond only in both cases has a formal charge of -1, but due to ressonance, they have a -1/2 charge along with the one making a double bond. d) It's harder to remove/easier to add a $H^+$ from/to a negatively charged anion like bicarbonate than nitric acid, therefore it's more acidic.