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AP Chemistry
7.4 Calculating the Equilibrium Constant
7.1 Introduction to Equilibrium
IntermediateMCQGraphicalConceptual14.2k
A line graph with a horizontal axis labeled Time (min) ranging from 0 to 10 with tick marks every 2 units, and a vertical axis labeled Concentration (M) ranging from 0.00 to 1.20 with horizontal gridlines and tick marks at intervals of 0.20. Three distinct grayscale curves are plotted. A solid black curve representing X starts at (0, 1.00), decreases smoothly, and flattens horizontally at (6, 0.60) through (10, 0.60). A dashed curve representing Y starts at (0, 0.00), increases smoothly, and flattens horizontally at (6, 0.60) through (10, 0.60). A dotted curve representing Z starts at (0, 0.00), increases smoothly, and flattens horizontally at (6, 0.20) through (10, 0.20). A legend in the upper right indicates: solid line = X, dashed line = Y, dotted line = Z. No other particles, labels, text, or annotations appear.
Concentrations of \(\text{X(g)}\), \(\text{Y(g)}\), and \(\text{Z(g)}\) versus time in a rigid container at constant temperature.
A sample of pure gas \(\text{X}\) is placed into a previously evacuated, rigid container at a constant temperature. The graph below shows the concentrations of \(\text{X(g)}\), \(\text{Y(g)}\), and \(\text{Z(g)}\) over time as the system approaches chemical equilibrium.

Based on the data in the graph, which of the following balanced chemical equations best represents the reaction?

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