Q149CP - Chemistry: Molecular Nature Of Matter And Change

Question

Nitrogen monoxide reacts with elemental oxygen to form nitrogen dioxide. The scene at right represents an initial mixture of reactants. If the reaction has a 66% yield, which of the scenes below (A, B, or C) best represents the final product mixture?

Step-by-Step Solution

Answer

The circle B will represents the final product mixture.

Step 1: Translating the statement

The chemical equation can be denoted as,

$2NO\left(g\right)+O_2\left(g\right)\to 2N{O}_2\left(g\right)$

Step 2: Representation for the final product mixture

There are six molecules of NO and three molecules of O₂.This will theoretically produce NO₂ 6 molecules. These reactants will give 4 molecules of NO₂ for 66% yield. When 4 molecules of NO₂ are produced, and 2 molecules of O₂ and 4 molecules of NO are used respectively. There are some unreacted 2 molecules of NO and 1 molecule of O₂. The representation of final product mixture is circle B.