Although they were formerly called the inert gases, at least the heavier elements of Group 8 do form relatively stable compounds. For example, xenon combines directly with elemental fluorine at elevated temperatures in the presence of a nickel catalyst.
Xe(g) + 2 F2(g) → XeF4(s)
What is the theoretical mass of xenon tetrafluoride that should form when 161 g of xenon is reacted with 140. g of F2?
What is the percent yield if only 157 g of XeF4 is actually isolated?