This is just another stoichiometry problem like the HNO3/NO problem below with a slight twist.
Solve for theoretical yield in grams, as before, then
%yield = (AY/TY)*100 = 94.5 and solve for AY.
Calculate how much acetylene (C2H2) can be produced from 358 g of H2O and an excess of CaC2 if the percent yield for this reaction is 94.5%.
CaC2 + 2H2O -> C2H2 + Ca(OH)2
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