| \begin{minipage}{0.45\textwidth} \centering [Figure (2): Graph with mol on y-axis (0 to 1, marked at 0.5), time (seconds) on x-axis (20, 40, 60, 80). Curve starts near 0 and increases, leveling off around 0.5.] \end{minipage} | \begin{minipage}{0.45\textwidth} \centering [Figure (1): Graph with mol on y-axis (0 to 1, marked at 0.5), time (seconds) on x-axis (20, 40, 60, 80). Curve starts near 0 and increases steeply, approaching 1.] \end{minipage} |
| [2em] \begin{minipage}{0.45\textwidth} \centering [Figure (4): Graph with mol on y-axis (0 to 1, marked at 0.5), time (seconds) on x-axis (20, 40, 60, 80). Curve starts near 0 and increases linearly.] \end{minipage} | \begin{minipage}{0.45\textwidth} \centering [Figure (3): Graph with mol on y-axis (0 to 1, marked at 0.5), time (seconds) on x-axis (20, 40, 60, 80). Curve starts near 0 and increases, concave upward.] \end{minipage} |
\textbf{224 –} If the progress graph of the decomposition reaction of hydrogen peroxide is as shown below, which of the following graphs approximately shows the change in the amount of oxygen in this reaction?
\textit{[Figure: Graph showing amount of substance (mol) on y-axis from 0.10 to 1.00, with values marked at approximately 0.74, 0.54, 0.40, 0.33, 0.27, 0.22, 0.18 at time intervals on x-axis (time in seconds) from 0 to 80. The curve is a decreasing exponential.]}
\bigskip
\begin{center}
\begin{tabular}{cc}
\begin{minipage}{0.45\textwidth}
\centering
\textit{[Figure (2): Graph with mol on y-axis (0 to 1, marked at 0.5), time (seconds) on x-axis (20, 40, 60, 80). Curve starts near 0 and increases, leveling off around 0.5.]}
\end{minipage}
&
\begin{minipage}{0.45\textwidth}
\centering
\textit{[Figure (1): Graph with mol on y-axis (0 to 1, marked at 0.5), time (seconds) on x-axis (20, 40, 60, 80). Curve starts near 0 and increases steeply, approaching 1.]}
\end{minipage}
\\[2em]
\begin{minipage}{0.45\textwidth}
\centering
\textit{[Figure (4): Graph with mol on y-axis (0 to 1, marked at 0.5), time (seconds) on x-axis (20, 40, 60, 80). Curve starts near 0 and increases linearly.]}
\end{minipage}
&
\begin{minipage}{0.45\textwidth}
\centering
\textit{[Figure (3): Graph with mol on y-axis (0 to 1, marked at 0.5), time (seconds) on x-axis (20, 40, 60, 80). Curve starts near 0 and increases, concave upward.]}
\end{minipage}
\end{tabular}
\end{center}
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