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Given the reactioon vessel and the balanced chemical reaction, what is the limiting reactant? Each symbol represents 1 mol of molecules of the substance.2C2H2(g) + 5O2(g) ----> 4CO2(g) + 2H2O(l)A. C2H2B. O2C. CO2D. H2O

Answer :

B


We need 5 mole O2 for 2 mole C2H2

For 1 mole C2H2 we need 5/2 = 2.5 mole O2

But we have only 1 mole O2

Hence O2 is limiting reactant.

Determine the balanced chemical equation for the chemical reaction
The balanced chemical equation is already given.
Convert all given information into moles (most likely, through the use of molar mass as a conversion factor).


25g×1mol180.06g=0.1388

40g×1mol32g= 1.25molO2


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