(a(i))[1]
In what way does the graph’s shape show that the reaction rate fell as the reaction went on?
(a(ii))[1]
Why did the reaction rate fall as the reaction continued?
(a(iii))[1]
At how many seconds did the reaction end?
(b)[2]
Draw a graph on the grid that shows how the reaction progressed when the smaller pieces of marble were used.
(c)[5]
Describe and explain, in terms of particle collisions, the effect of using a higher temperature on the time needed for the reaction to finish.