What would have been the initial pressure reading of a sample of oxygen gas that started at 25.0 ml in volume and was compressed to 15.0 ml? the final pressure reading was 1.90 atm. (temperature was kept constant.)

How does a sample of helium at 15 degree celsius compare to a sample of helium at 215 k? a) the helium at 15 degrees celsius has a higher average kinetic energy that the sample at 215 k. b) the helium at 15 degrees celsius has lower nuclear energy that the sample at 215 k. c) the helium at 15 degrees celsius has slower- moving atoms that the sample at 215 k. d) the helium at 15 degrees celsius has smaller atoms than the sample at 215 k.