I have an unknown perfect as. It appears to be madeentirely of xenon and fluorin

Question

I have an unknown perfect as. It appears to be madeentirely of xenon and fluorine. At 25 deg. C and at apressure of 101.325kPa the desnity of the gas is 10.026 g/L. What is the molecular formula? HINT: It is hard toimagine a moleculre with more than on xenon atom in it. Will rate lifesaver asap!! I have an unknown perfect as. It appears to be madeentirely of xenon and fluorine. At 25 deg. C and at apressure of 101.325kPa the desnity of the gas is 10.026 g/L. What is the molecular formula? HINT: It is hard toimagine a moleculre with more than on xenon atom in it. Will rate lifesaver asap!!

Explanation / Answer

          Temperature T= 25+273                                 =298K               Pressureof the gas P= 101.325kPa              Densityof the gas d =10.026g/L             Universalgas constant R=0.0821L.atm/K.mol                               But we know d= PM/RT                                                M= dRT/P                                                    =10.026*0.0821*298/1                                                    =245.3g                      molar mass of unknown compound = 245.3g                                      But it is equal mass to the XeF4 molecularmass So the unknown gas is XeF4.

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