Oxygen Gas, Generated by the Reaction 2KClO₃(s) → 2KCl(s)

Multiple Choice

Oxygen gas, generated by the reaction 2KClO₃(s) → 2KCl(s) + 3O₂(g) , is collected over water at 27°C in a 3.72-L vessel at a total pressure of 730. torr. (The vapor pressure of H₂O at 27°C is 26.0 torr.) How many moles of KClO₃ were consumed in the reaction?

A) 0.100 mol
B) 0.210 mol
C) 0.0933 mol
D) 70.9 mol
E) 1.04 mol