$$HNO_3 + NaHCO_3 \rightarrow NaNO_3 + H_2O + CO_2$$

Explanation:

Nitric acid (HNO3) is a strong acid, while sodium hydrogen carbonate (NaHCO3) is a weak base. When a strong acid and a weak base react, the products are the salt of the weak base and the weak acid (in this case, sodium nitrate (NaNO3) and carbonic acid (H2CO3)). Carbonic acid is unstable and quickly decomposes into water (H2O) and carbon dioxide (CO2).

The overall reaction can be summarized as the neutralization of nitric acid with sodium hydrogen carbonate, resulting in the formation of sodium nitrate, water, and the release of carbon dioxide gas.