hayelyben hayelyben 07-10-2022 Chemistry Answered 1. What is the [H3O+] of 0.145M HNO2 ? Assume that the Ka=7.2x10^−4 at 25 ∘C . Express your answer using two significant figures. 2. What is the pH of 0.145M HNO2 ? Express your answer using two decimal places.