A mixture of carbon dioxide and krypton gases is maintained in a 7.00 L flask at a pressure of 3.73 atm and a temperature of 90 C. If the gas mixture contains 19.6 grams of carbon dioxide, the number of grams of krypton in the mixture is ?g

The stopcock connecting a 3.28 L bulb containing methane gas at a pressure of 5.85 atm, and a 8.20 L bulb containing nitrogen gas at a pressure of 4.54 atm, is opened and the gases are allowed to mix. Assuming that the temperature remains constant, the final pressure in the system is ? atm.