What is the maximum number of moles of al2o3 that can be produced by the reaction of 0. 40 mol of al with 0. 40 mol of o2 ?.

Apump contains 0.5 l of air at 203 kpa.you draw back on the piston of the pump, expanding the volume until the pressure reads 50.8 kpa. what is the new volume of the air pump