Question

what is the formula for nitric acid?
○ h(no₂)
○ h₃n
○ h(no₃)
○ h₂(no₃)

Explanation:

Nitric acid consists of the nitrate ion ($\ce{NO_3^-}$) and a hydrogen ion ($\ce{H^+}$). To balance the charges, one $\ce{H^+}$ combines with one $\ce{NO_3^-}$, giving the formula $\ce{H(NO_3)}$ (or more commonly written as $\ce{HNO_3}$). The other options: $\ce{H(NO_2)}$ is nitrous acid, $\ce{H_3N}$ is ammonia (in a different notation), and $\ce{H_2(NO_3)}$ is incorrect for nitric acid.

Answer:

C. $\ce{H(NO_3)}$ (assuming the options are labeled A: $\ce{H(NO_2)}$, B: $\ce{H_3N}$, C: $\ce{H(NO_3)}$, D: $\ce{H_2(NO_3)}$)