In the Brønsted–Lowry model, what is the conjugate base of $HCN$?

In the Brønsted–Lowry acid–base model, what is the conjugate acid of $N_1{H}_3$ (ammonia)?

In the Brønsted–Lowry model, what is the conjugate acid of the sulfate ion $S_O{}_4{}^2$ (i.e., $S_4{O}_4{}^{\mathrm{}}$)?

In the Brønsted–Lowry model, what is the conjugate base of $HI$ after it donates a proton?

In the Brønsted–Lowry model, what is the conjugate base of $N_4^{+}$ (ammonium)?

In the Brønsted–Lowry framework, what is the conjugate acid of $H^{-}S$ (HS⁻)?

In the Brønsted–Lowry definition, what is the conjugate base of the ammonium ion $N_4^{+}$ (often written as $N_{4}H+$)?

According to the Brønsted–Lowry definition, what is a base?

According to the Brønsted–Lowry definition, what is an acid?