Magnesium undergoes reaction with dilute sulfuric acid. $\text{Mg(s)} + \text{H}_2\text{SO}_4\text{(aq)} \rightarrow \text{MgSO}_4\text{(aq)} + \text{H}_2\text{(g)}$ There were two separate experiments. In experiment 1, $24.0\,\text{g}$ of magnesium was reacted with $100\,\text{cm}^3$ of $1.0\,\text{mol dm}^{-3}$ sulfuric acid. In experiment 2, $24.0\,\text{g}$ of magnesium was reacted with $50\,\text{cm}^3$ of $2.0\,\text{mol dm}^{-3}$ sulfuric acid. For each experiment, the hydrogen volume was recorded at different times. The data were then plotted on a graph. Which graph is the correct one?