according to your calculation, a reaction should yield 5.67 g of O2. What do you expect the volume to be at 24.0°C and 980 atm? remember to convert grams to moles.

Answer 1

PV/T is constant, so since one mole occupies 22.4L at STP,
980V/(24+273) = 1*(22.4 * 5.67/32)/273