(a)[1]
Find the mass of the reaction mixture at 58 seconds.
(b)[2]
Which point on the graph, A, B, C or D, showed the fastest rate of reaction? Use the graph to justify your answer.
(c)[1]
If $0.42$ g of magnesium carbonate produces $120\ \text{cm}^3$ of carbon dioxide, determine the volume of carbon dioxide made when $1.26$ g of magnesium carbonate reacts fully.
(d)[2]
What effect do the following have on the rate of this reaction? • Lowering the concentration of the acid. • Cutting the magnesium carbonate into smaller pieces.