Question: why hno3 is stronger than hno2?
Answer: a. HNO3 is more acidic than HNO2 because as the number ofoxygen atoms attached to the N atom increases, they become moreeffective at withdrawing electron density from the O-H, therebyweakening and polarizing it. This increses the tendency for themolecule to produce a proton, and so its acid strengthincreases.