A student investigates the thermal decomposition of copper carbonate. copper carbonate → copper oxide + carbon dioxide Here is the set-up of the apparatus she uses. The student measures the mass of copper carbonate at the start of the experiment. She then measures the mass of copper oxide made. She does the experiment five times using a different mass of copper carbonate each time. Look at her results. Plot a graph of the student’s results and draw a line of best fit. – 7557

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1. On the graph, the x-axis is labelled “Mass of copper carbonate (g)” and the y-axis is labelled “Mass of copper oxide (g)”. The scale is appropriate, all points are plotted correctly, and a smooth line of best fit is drawn through the points.

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