Recycle, Bypass, Purge & Gases on Chemical Engineering related Questions and Answers

Question :   A container has gas mixture of 40% CO2 and 60% H2 with total pressure 10 Pa, if now O2 is added to it isothermally so that the final composition of the mixture becomes 20% CO2, 30% H2, and 50% O2, what is the partial pressure of O2 in the new composition? 1. 5 Pa 2. 10 Pa 3. 20 Pa 4. 35 Pa Answer :   2 - 10 Pa