[Akhmal]

For the reaction H2O(g) + Cl2O(g) → 2HCIO(9), you know S rxn and Sosys and S° of HCIO(g) and of H2O(g). Write an expression that can be used to determine Cl2O(g).

i dont understand this question

[mjc123]

Neither do I. There must be something missing. Are you sure you have transcribed it correctly?
What is meant by "determine Cl₂O(g)"? Do they mean determine S° of Cl₂O(g)?