Which one of the following gases could most easily be differentiated from propane (CH₃CH₂CH₃)on the basis of density when compared at the same temperature and pressure?

Question

Quizplus · Accepted Answer

Propane (C3H8) has a molar mass of 44.1 g/mol while fluorine gas (F2) has a molar mass of 38.0 g/mol. Therefore, at the same temperature and pressure, fluorine gas will have a lower density than propane and can be easily differentiated from propane based on density. The other gases listed (CO, NO, and N2O) have molar masses that are relatively close to propane and would not show a significant difference in density at the same temperature and pressure.

Which One of the Following Gases Could Most Easily Be