Assuming the gases to be ideal answer the following a) a vessel contains 7 grams of nitrogen and 11 grams of carbon dioxide at a temperature of 300 k and at 1 atm. what is the density of the gas? b) a vessel contains argon at an initial temperature of 300 k. the gas expands reversibly and adiabatically from a volume of 50 liters to 200 liters. what is the final temperature?