1. The problem statement, all variables and given/known data In considering the reaction: 3NO (g) + H2O (l) → 2HNO3 (aq) + NO (g) student A writes the equilibrium expression as: K=[NO][HNO3]2/[NO2]3 while student B writes: K=PNO [HNO3]2/[NO2]3 Whose equation is correct? 2. Relevant equations NA 3. The attempt at a solution This is a multiple choice problem but I wanted to know how each student would arrive at a different value for K.