Two drums of 1.70 and 4.60 liters respectively are separated by a closed tap in the narrow and short connecting tube of both drums. The first vessel contains Ar gas (molar mass 40 g / mol) at a pressure of 520 hPa, the second contains O2 gas (molar mass 32 g / mol) at a pressure of 1.13 bar at a common temperature of -60 ° C. The tap is then opened. The temperature is kept constant.
The final pressure is then:
a) 222.8 hPa
b) 96.54 kPa
c) 14.11 kPa
d) 148.6 hPa