posted by Jo .
12.00 liters of oxygen gas is under a pressure of 20 mm Hg. If the volume of this gas is decreased to 2.00 liters at constant temperature, what will the new pressure be?
I believe this is Boyle's law and the answer should be 120 mm Hg, but according the answer on practice test it is saying 15 mm Hg.. Please verify. Thanks
See your post below