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.