F. additional problems solve the following problems in the space provided. show your work. 30. the gaseous product of a reaction is collected in a 25.0-l container at 27°c. the pressure in the container is 216 kpa, and the gas has a mass of 96.0 g. what is the molar mass of the gas? 31. the separation of uranium-235 from uranium -238 has been carried out using gaseous diffusion. calculate the relative rates of diffusion of gaseous uf6 containing these isotopes. molar mass of uf6 containing uranium-235 = 349.0 amu. molar mass of uf6 containing uranium-238 = 352.0 amu.