A mixture of gasses is 29.58% oxygen, 11.72% nitrogen and 58.70% argon by volume. The mixture is held in rigid 21.00 L container at temperature of 20.50 C. The partial pressure of oxygen Po2 is 390.00torr
1) Explain what is the total pressure Ptot in the container?
2) Explain what is the partial pressure of argon (PAr) in the container?