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

Question :   A container has gas mixture of 20% H2 and 80% N2 with total pressure P, now same amount of O2 is added to the mixture, what is the new partial pressure of N2? 1. 0.2P 2. 0.8P 3. P 4. 1.6P Answer :   2 - 0.8P