(a) Why air is dense at the sea level? Explain.
(b) Calculate the total pressure in a mixture of 4g of O2 and 2g of H2 confined to a total volume of 1 L at 0°C. (R = 0.821 L atm mol-1)
(a) Heavier gas will come down and lighter air goes up. Air at sea level is denser due to compression by mass of air above it.
