## Chemistry and Chemical Reactivity (9th Edition)

Since $n=PV/RT$ and T and P are equal: $n\propto V$ Since the ratio of the volumes : $4.0\ L/1.5\ L=2.67\lt 3$ Oxygen is the limiting reactant. Number of moles of oxygen: $n=4.0\ L×1\ atm/0.082057\ L.atm/mol.K/273\ K$ $n=0.179\ mol$ From stoichiometry, that's the same as the number of moles of water.