How do you write a balanced chemical equation for the reaction in which dinitrogen pentoxide gas reacts with water to produce nitric acid?

${N}_{2} {O}_{5} \left(g\right) + {H}_{2} O \left(g\right) r i g h t \le f t h a r p \infty n s 2 H N {O}_{3} \left(g\right)$
$\text{Dinitrogen pentoxide}$ is the $\text{acid anhydride}$ of nitric acid.