What is the bronsted acid of no2- + h2o hno2 + oh-

Answer;

H2O -Bronsted Acid

Explanation;Bronsted-Lowry acids are  H+ donors , while Bronsted-Lowry bases are H+ acceptors .A reaction of a Bronsted-Lowry acid and a Bronsted base is a neutralization reaction that is characterized by H+ transfer.The above reaction is an example of base ionization or dissociation where;

                 B (aq) + H2O (l) → BH+ (aq) + OH– (aq)

          That is; Base + Acid will give a conjugate acid + hydroxide ion

In our case; NO2- + H2O → HNO2 + OH- ; H2O is the H+ donor and thus, it is a Bronsted Acid.