Indicate how this error would effect(increase, decrease, or no effect) the calculated molar volume of O_2 at STP (assuming you complete the experiment otherwise correctly): After you finish heating your sample and the system cooled to room temp, you closed the clamp on tube D without re-equalizing the pressures inside and outside of the flask. The water in beaker E was 4 inches deep and the water in flask C was 2 inches deep.