You are given 4.5 moles of #O_2# to react with #1.60 x10^2# g #C_2H_4#. Upon completion of the reaction, will there be any remaining #C_2H_4#?
There is insufficient dioxygen to combust the ethylene completely.
We represent the combustion of ethylene by this reaction:
For complete combustion,
And, this quantity of ethylene requires,
However, we can certainly represent incomplete combustion:
Both of these reactions would occur to some extent in any combustion reaction. Given the limited quantity of oxidant, some ethylene would remain unreacted.