Chapter 16, Problem 5QP

Write the formulas of the conjugate bases of the following acids: $\left(\text{a}\right){\text{ HNO}}_{\text{2}}\text{, }\left(\text{b}\right){\text{ H}}_{\text{2}}{\text{SO}}_{\text{4}}\text{. }\left(\text{c}\right){\text{ H}}_{\text{2}}\text{S, }\left(\text{d}\right)\text{ HCN, }\left(\text{e}\right)\text{ HCOOH}$ (formic acid).