Question

question①
what is the name for the acid with the formula $\text{hno}_2$?
answer
nitrous acid
nitric acid
hydronitrous acid
hydronitric acid
nitrate acid
i dont know yet

Explanation:

The acid $\text{HNO}_2$ contains the nitrite ion ($\text{NO}_2^-$). For oxyacids, when the anion ends in "-ite", the acid name uses "-ous" instead of "-ite" and adds the prefix "hydro-" only for binary acids (not oxyacids). Nitric acid corresponds to $\text{HNO}_3$ (nitrate ion), while the other options do not match the formula $\text{HNO}_2$.

Answer:

Nitrous acid