1.)An unknown gas has a mass of 1.36 kg and occupies a volume of 0.628cubic meters at 198 kPa and 35oC. Determine the gas constant of this gas.
2.)A 0.5 cubic meter tank contains oxygen at 150 atm and 25oC. If oxygen may be assumed to behave as an ideal gas, how many kilograms of oxygen are there in the system?