Answer
$P_2O_3(l)+3H_2O(l)\longrightarrow 2H_3PO_3(aq)$
Work Step by Step
$P_2O_3(l)+3H_2O(l)\longrightarrow 2H_3PO_3(aq)$ is balanced with three moles $H_2O$ and two moles $H_3PO_3$.
You can help us out by revising, improving and updating this answer.
Update this answerAfter you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.