(a(i))[1]
What property of oxygen gas lets it be collected in this way?
(a(ii))[1]
Name another item of apparatus that could be used to collect and measure the volume of oxygen gas.
(a(iii))[2]
Give a test and an observation that can be used to identify oxygen.
(b)[4]
Plot the results on the grid, circle the anomalous point, and use the plotted points to draw a curve of best fit.
(c)[4]
The student repeats the experiment at $50\,^{\circ}\text{C}$. On the grid, draw a second curve to show the results at this temperature and explain your answer.