A neon dioxygen mixture contains 70.6 g of O2 and I67.5 g neon. If pressure of the mixture of gases in the cylinder is 25 bar. What are the partial pressures of O2 and Ne in the mixture, respectively?

Number of moles of O2=70.6 g32 g mol-1=2.21 mol Number of moles of Ne=167.5 g20 g mol-1=8.375 mol Mole fraction of O2=2.212.21+8.375=0.21 Mole fraction of Ne=1-0.21=0.79Partial pressure of a gas = Mole fraction x total pressure Partial pressure of O2=0.21×25=5.25bar Partial pressure of Ne=0.79×25=19.75bar