Question

If 2.10 mol of nitrogen monoxide gas and 2.30 mol of oxygen gas react, what is the limiting reactant? 2NO(g)+ O 2 (g)→2N O 2 (g)

Answer 1

limiting reactant : It is the chemical substance that consumed totally in a reaction.

Now , from the balanced reaction

Mole ratio of NO and O₂ = 2:1

So, 2.10 mol Nitrogen monoxide completely reacts with $\frac{1}{2}$ × 2.10 = 1.05 mole oxygen.

But moles of oxygen = 2.30.

Hence, Nitrogen monoxide is totally consumed in the reaction.

So, limiting reactant is nitrogen monoxide.