A sample of 220 cm3 of helium and a sample of 180 cm3 of xenon, each at 293 K and 120 kPa, are transferred into an evacuated flask of volume 1.50 dm3. What is the pressure of the gas mixture in the flask at 293 K?
17.6 kPa17.6\text{ kPa}17.6 kPa
32.0 kPa32.0\text{ kPa}32.0 kPa
64.0 kPa64.0\text{ kPa}64.0 kPa
320 kPa320\text{ kPa}320 kPa