Question

Acetylene gas, c2h2, burns in oxygen to produce carbon dioxide and water. If 61.4 g of co2 are produced when 22.7g c2h2 react with sufficient oxygen, what is the percent yield for the reaction?

Answer 1

Here is an example. Just follow the steps. Using these steps, solve for the theoretical yield, then follow the percent yield part of the example.
http://www.jiskha.com/science/chemistry/stoichiometry.html